Hearing that the crowdfunding campaign of PoE2 had begun made me extremely excited. I went to the Fig page and signed up my pledge, eagerly awaiting the new stretch goals.
Then a few days afterwards I read in the comment section that the spell casting will be implemented with a new empowerment feature. My first reaction to it was denial. Reading this forum has brought me out of that, but drained away all the giddiness I felt towards PoE2.
I always play a wizard when I play a rpg, and I have never had more fun playing a spellcaster than I did in the IE games. In my opinion the right step is moving closer to a vancian system with more limitations. Not infinite magic missiles, so that the wizard can be used as a backup fighter.
Since some of the inspiration for the empowerment system seems to be coming from Tyranny let's take it as an example. For most part of the combat I can let the AI control all of my characters and set it to use all abilities. The computer will do almost just as good a job at removing the trash mob as I would. I don’t have to care about which abilities that are used since I have an infinite use of them. Now the argument against this could be that the empowerment/mana only replenishes at rest, but why rest if all I'm getting is a few more missiles or larger area of effect. I never had much problem with getting rid of trash mobs (not even in PotD) in the first place and all this feature does is make your characters more capable of handling such mobs. If the choice was mine there would be almost no trash mobs, they make no sense character wise anyway. Trash mobs are boring and exist solely for the purpose of that the player can get more bang for his buck while decreasing the role playing aspects of the game. This is one of the reasons I'm strongly against removing the Vancian spellcasting system.
If rest spamming is a problem, it can be solved in numerous ways, some excellent suggestions have already been mentioned above. This of course discourages casual gamers and those new to the genre, but it could be solved by for example adding a difficulty setting where every character has unlimited access to his special abilities.
This post is getting to long, and even though there are other aspects of spellcasting I would like to discuss, I'm ending it here for now. Having been informed of the new spellcasting system I have reduced my pledge to just the digital version of the game from a collectors edition.
P.S.: Sleeping in a dungeon is cheating, and if I was your DM none of the sleeping beauties would wake up from their magical dreams. Going back to an inn for sleep while exploring a cave would result in that cave being evacuated by the time you come back.