The main issue to me was the design of spells itself.
Levels frequently meant nothing in terms of spell power or usefulness – especially for the priest.
Crowns of the faithful was probably the most powerful buff in the game, while shining beacon and DotF were bread and butter.
The only reason I was using other spells was because I was playing a kind of melee priest, other than that all battles would come down to a combination of these three spells plus the prayer appropriate to remove afflictions.
So for me overall if they manage to design the spells in a meaningful way I’m more than happy to pick them on level up.
I very much prefer this to having dozens of spells that I never use due to their uselessness (disspotent blows or circle of protection –scrolls do a better job - anyone?)