I love BH squad. But , there is always but.......
Dengar has quite good abilities, but is very slow, very slow. Like a snail. His dmg is also problematic, very low. Synergy beetween BH is also not so good, almost no synergy - tm gain is not winning strategy right now. Zam abilities should be reworked couse she has possibility to inflict Evasion down but she needs to apply tenacity down to have more chance to put detonators. Detonators can be easily dispelled, so when this is the case all team is lacking dmg. Dengar should have Evasion down to decrease number of missed shots done by Zam. Also problematic is crit chance. When You use potency set team is low with crit chance. High health but smaller dmg. Next thing Is taunt, no taunt. They cant heal themselves and no protection from debuffs.
Boba ability to dispel buffs is not really designed for this. It should be like finishing the target but not to dispel for example taunt. Taunt is also a problem couse Zam must shoot according to this rule, she cant ignor this. So all the idea to shot opponent's toons one by one doesnt work well. If it is happening Zam has long cooldown to aply detonators again. So You cant in this case use Greedo ability to put detonators together with Zam. So fight is getting longer and after 4 rounds your team is gone. Stuned, shocked, dazed, buff immunity, speed down, health down, offense down, burning..... They cannot clear it or protect themselves. So their potential of being very fast team is just on paper. Doesnt work in real fight.
Also they have no crit immunity so they receive a lot of damage very fast. This is how I see this team. 9 months ago they could take 1 spot in arena, but for now they cant hold top 200.