I started playing D&D back in 1982. As I got older, I ended up playing the next iteration of the game, sticking with the Advanced version, from 1e, to 2e, through the Skills & Powers, into 3rd, and 3.5. I then played Pathfinder 1e (D&D 3.75), and into 4th edition D&D, after surviving that I transitioned to 5e, and now I, and my group have tried Pathfinder Playtest (2e).
Throughout the years, people railed against the Vancian system, I for one understood their pain. It was an artificial system that punished the players for making choices for the future for their characters that often turned out to be detrimental. That being said, Spell Points did pop up in 2nd edition as alternative casting options, and they found their way into 3rd as alternative spell methods. Then look 5E comes along.
Bam! All casters get a number of cantrips that work out of the box and are useful, and they get a number of spells per day, and can choose a number of spells equal to their casting modifier and their level, from spells they know, as available, and can cast them via the spell slots they get. So John Q Wizard Level 3, with an 16 Intelligence (+3 Modifier) can choose 6 spells of level 1 & 2 that he knows. While Sally the Cleric who's level 5 and has an 18 Wisdom (+4 modifier), can choose from 9 spells she knows of from levels 1 through 3. She can then cast them like John, by expending spell slots. Casting the spells at whatever spell slots she feels like expending. Okay DAMN! That feels good for the player, great for the DM because the player has some interesting choices and a lot of optional freedom to cast said spells.
So then we are giving this Playtest a run through.
We hit the spells... the actions are clever, the so and so is okay.. but wait.. we have to memorize exactly what each spell slot has in it's place for the entire day? Why are we punishing the players creativity, and why are they doing this when the Most Popular Roleplaying Game in the world Learned to love it's players and not penalize them for having fun. 5E learned from decades of gameplay. They evolved.
The reality is for our group, this is a no go. It's what the playtest showed us, it's not for us. We can't go backwards, because of some Sacred Cow that was already killed in other editions and for the better. I say killing Sacred Cows, you all have certainly done that for many things in this Playtest.
I know others have expressed their thoughts on this, but I felt from a testing perspective, I had to share, the sheer revulsion our group experienced with regression of the Vancian system.