This might start some trouble, but I have noticed some broken things in 5e. Like the Tempest Cleric getting awesome bonuses to lightning spells, but no access to said spells. (Until level 3, call lightning once or twice a day) Real funny D&D.
How about the cleric inability to heal during combat? Yeah, burn your highest level spells to keep that Barbarian at max HP while a goblin with a stick undoes that work. Of course, they balance this by being able to heal yourself during short rests, or fighters healing a bit. Why not use a herbalism kit to spend 1/2 the GP and a weeks to brew a healing potion. Lame.
How about the cleric inability to heal during combat? Yeah, burn your highest level spells to keep that Barbarian at max HP while a goblin with a stick undoes that work. Of course, they balance this by being able to heal yourself during short rests, or fighters healing a bit. Why not use a herbalism kit to spend 1/2 the GP and a weeks to brew a healing potion. Lame.