add to that bestow curse is a 1min concentration spell, remove curse is a spell to break it if you can't wait a full minute. Nearly all of the crowd/battlefield control & debuff spells are concentration spells that use a spell slot and lack something like hex's bonus action move itStoneskin, Barskin, Hail of Thorns, any smite spells - they must not have Concentration.
Then you have nonsense like flaming sphere & minute meteors that both chew up bonus actions and have a short 1 min duration or very limited number of uses(6) with slightly longer 10min duration. Is it balanced by the bonus action or not & if not what's the point of both concentration and short duration and spell slot usage when the (2d6) damage is nothing to write home about. That says nothing about spells like enhance ability that are made almost completely worthless compared to nearly any other spell using a slot of that level by applying concentration to them like enhance ability