I'm playing D&D since 2nd edition and went trough 3rd, a bit of 3.5 and I did not like 4th that much, basically the reason why we are currently moving on to Pathfinder.
Since 2nd edition, we never took the rule where spellcasters have to choose which spells they are going to cast during the day. Instead, all known spells are available, at any given time, to the spellcasters as long as they have available slots of the correct level just like stated by the rules, only particular components are taken into account also (i.e. 1000 po gem for Augury).
Since spellcasters don't have to choose daily spells means that we never used the "Spontaneous Casting" available to cleric. We never used rules for treasures niehter so objects granted to players have never been let to hazard so there won't be tons of "Wands of cure X" as stated in the "rules" book.
But still, I find that the current "Channel Energy" gives way too much healing available to cleric and I am more and more convinced that this part of the rule will be "ruled out" of my next campaign for reasons stated in my previous post.