plus SE doesnt need to add anything , just add some attack patterns to mobs and put some interesting mechanics

examples , the slime queen in FFXI bcnm , usually perfect for rngs but any1 with some burst dps was welcomed, that bcnm was tons of fun , lots of slimes coming from the outside to gather at the center of the bcnm , a mage binding and graviting (heavy in FFXIV) , so dps could kill the slimes before they got to the center , at the end it poped a boss based around the number of slimes....

the 3 boxes bcnm , u need to choose wich one to attack , only 1 is a treasure the others are mimics

the sea monk that u need to kill the tentacles....

lots of fun and engaging bcnms, the issue here is only a few jobs have CC (sleep) , only a few can silence ,and only a few can slow / stun ....but if some bcnms are lvl 30ish or 40ish...im sure ppl wont mind leveling a job for it.... lots of ppl leveled BST for doing bcnms , same for BLM ...or rdm...