I think reading up on the changes to spellcasting is probably the biggest hurdle I have when it comes to trying PF2E, and I wonder what the community thinks about it.
Vancian casting is already very clunky and hard to work with (Schrodinger's Wizard aside) and PF seems to have tripled-down on that.
Simply put, upcasting spells for things like damage is pretty much always a bad idea, yes? A 6th level spell cast in a 6th level slot is always better than a 2nd level spell cast in a 6th level slot.
The one exception to this is spells that *must* be upcast to be effective - Dispel Magic and the like... But how on earth are you supposed to prepare upcast utility spells with anything even remotely resembling success? If you want to beat your foe's illusions or enchantments or whatever... it's just a crapshoot where you pray you prepped it high enough? Or you're required to put those spells as your Signature Spell (or other similar class ability), yes?
Maybe errata has softened things since last I looked, but it seems like spellcasting is just a mathematical nightmare (too many choices, too many possibilities to have to plan for, etc).
How does one deal with this? Or how is it not as bad a problem as it seems?