I like clerics thematically. However, I don't think they benefited from the change between 3.5 and Pathfinder. As more and more classes and options become available, that has become more apparent to me (also, wizard I believe suffers a from similar issues, but that's a different story).
Firstly, let's look at what is generally expected of a cleric and how well they perform in those rolls. But before that, let me make a statement - in combat healing is for chumps. I you aren't casting (or whatever) something that will either heal a bunch (like a heal spell) or fix an issue that could be life or death (remove paralysis for example, depending on the situation). While some may argue this is incorrect, the best "healing" involves quickly decimating your enemies and patching up afterwards - healing in combat slows that down. I've seen this time and time again in the APs I've been a part of, either as a player or a DM. Someone with the ability to use a wand of CLW, even if by UMD, gets the job done. I won't discount other healer builds, specifically the oradin, but we're focused on the cleric here.
With that being said, when we think of cleric (or at least when my group thinks about cleric), we harken back to the glory days, like in 3.0 when they were indestructible monsters. Spells were a bit more powerful then, and clerics could use that, combined with domains, items, and later on feats centered on turning their turn undead power into something useful to smash face. There's a certain expectation of that now, but cleric as it stands can't do that anymore.
The issue is twofold - firstly, while most core classes were boosted and continue to be boosted in Pathfinder, cleric has been left behind (and it's not the only class - see wizard, and even rogue despite the "unchained" variant). Secondly, with the general toning down of magic and apparent increased focus on martial combat makes maximizing a cleric problematic.
Clerics used to be able to, and quite well, mix the martial and spellcasting options of the class. Nowadays, trying to accomplish that is a foolhardy task. Your stats will be spread too thin, and you have to spend far too long buffing in a vain attempt to be the equal of a martial character, and your spells suffer from not having a maximized spellcasting stat. These issues present themselves even if you do focus on one aspect over the other - a martial focused cleric spends too much time buffing, and a spellcasting focused cleric... well, the cleric spell list is decent, but you have to be creative. In my opinion, the spellcasting focused cleric is the way to go. If you want to play a martial cleric, play a paladin or a warpriest. Warpriest was definitely the final nail in the coffin for a martial cleric. The first was taking away heavy armor proficiency.
But I haven't even talked about healing! So Pathfinder gives us channeling, which at first I was like wow, free healing! I can use spells on other things and not heal! Well, maybe. First off, it's based off charisma - the biggest failure of the ability. The second biggest, needing a feat to not heal everyone in range. Suddenly, paladins become better at channeling since they typically have higher charismas, it just costs a bit more for them. Warpriest? They get to use their wisdom... why not cleric?!? In any case, in combat healing kills action economy - you should be trying to out damage your opponents, killing them faster - not trying to out heal their ability to damage. That's a losing battle, because healing is limited, swinging an axe is not.
To continue to the next point about healing - your choice of channeling/spontaneously casting healing magic is alignment based. This means evil clerics are horrible healers. Why? Is that really necessary? Look at oracle (another class that seriously makes the cleric look like only a slightly better option than adept) which gets to choose. Just choose, no alignment involved.
Other things about cleric just make it a joke. It's bad enough with things mentioned above, but let's talk about the theme of the class. Tell me, does 2 skill points a level sound right? It's generally accepted that clerics go through some form of training - seminary school if you will. That means study, yet they get less skill points than an oracle, who just sort of gets their power. Though wizards may also fall into this category, they at least have a high intelligence score to compensate for it (not that it makes it right by any means). Clerics already have an issue with stats being spread too thin, and intelligence is easily the stat of least importance. Really, 4 skill points per level would be fair. That way, they could have things like spellcraft and knowledge (religion) at levels that are meaningful, with a few points to spare for other things depending on the individual. Like, how does a cleric proselytize without skills? I mean, you could focus on like one aspect with 2 skill points per level, but that's lame.
Then there are the issues I have with prepared spellcasters vs spontaneous casters. That may be a bit more of a personal issue, but I do believe that prepared casters just lack the magical endurance you need for having more than one fight in a day. I don't like the idea of "oh, I cast that spell so that was the only one today, sorry guys", especially when it fails somehow. No amount of foreknowledge and preparing the perfect spells for a situation will beat spamming good, general use spells. Burst of Radiance is a good example of a nice, spammable cleric spell.
All of this makes me sad. I like what clerics represent, and what they could be. You want to know why no one wants to play the cleric? It's because the class needs an overhaul. You want to know why nobody wants to play a healer, as I suspect that's the real question? Because unless you're an oradin and have the action economy to fight while healing, you're better off dropping the monsters and healing when it's over.
#incombathealingisforchumps