As one who as been playing as a cleric class since the start of beta the one thing that’s really been annoying me is the low duration of buffs in general, in dungeons you pretty much have to rebuff after every fight which is a pain if the buff is a ground target as you will miss some party members constantly.
What i suggest is simply to increase the Duration /SP cost and CDs of buffs four folds. This would change nothing in term of upkeep cost but for support classes it would be a massive quality of life improvements to only have to rebuff your team every 2-3 minutes instead of every 30-40s.