The decision to make spells with more than one target area of effect spells with a limited area and agency over who to buff/disable instead of just clicking some targets is more than questionable to me.
I don't want to bring my wizard or warlock next to the dangerous melee fight just to get Bless on all of them. Or even worse, someone in my party has a summoned familiar other characters fighting with me somewhere in between and I can only waste one of the bless buffs on them. It might have to do with the current difficulty tuning of enemies, but when deciding between a buff/control spell or just blasting an enemy with damage, I almost always choose the latter because I get the result I expected. Please let me choose my targets for buffs. I can choose with scorching ray or similar damaging spells afterall.
To dispel the doubts that it might slow down combat or make it less enjoyable to simply click your intended targets:
It is faster to click your targets than to find the exact spot where your targets are closest to the center or barely still in the radius while less critical allies or enemies are not.
In quick and easy fights, these spells usually do not come into play anyway.
In difficult fights, right now it is frustrating to make tiny mistakes in positioning and then realize you can't cast at the targets you want to or even worse - be at the mercy of any npc movement.
At the relatively low levels of the Early Access it is very apparent with Bless, but I can imagine it only gets worse on higher levels when it's possible to upcast something like Hold Person to target several dangerous enemies or twin some high level spell only to be restricted by some tiny circle. I want to figure out challenging and interesting encounters, not run away until I funneled my enemies around enough corners to finally be able to cast the spells I need to win difficult battles.