I particularly don't like Mirror Image (3 images, lasts 1 minute). Because it only lasts 1 minute, you can't precast it before most fights. But then you have to spend your first turn's action casting it, which doesn't feel worth it due to the low # of images and the relatively short (~4-8 round) combat lengths.
It would be great for Mirror Image to be a bonus action.😊
also i kinda dislike concentration. most of cleric spells are concentration. after casting bless, you can't cast any other spells. it's so restrictive. also concentration broken if getting hit. man i kinda hate this concentration mechanic really deeply now.
Druids have too many concentration spells as well!