"problems"
Exdeath positioning while he does a proximity baited 5y aeo buster is inconsistent in BH set 1
Healers potentially having to move for back to back tether sets instead of a single tether set in BH set 1
Tanks going to 1 HP 3 seconds before an auto attack in BH set 4
Tanks having mit and which boss they tank dictated due to the priority of "old BH" strat instead of Exdeath positioning being fixed by not having tanks ever take 2nd tether in BH set 1.

Is this clear enough for you?