I agree with most of what you said, and I haven't seen the explanation you're speaking of. Maybe you could paste it here. But I totally disagree with you that it would be OP, especially when compared to the giant list of op abilities the sith have. It would be a strong attack and give more of a reason to use healers as well as a gk lead, instead of everyone using Bastilla. Btw hoda does not trigger this attack because his team heal is a basic and not a "special" which is required. Not to mention if you really wanted to launch like 6 in a row you would have to have a bunch of healers who do less damage. Also there would be like a hundred ways for sith or anyone else to disrupt it daze, stun, isolate, etc...
I'm sorry but saying it's to op is just not valid given the abilities of other factions. Allowing it would bring more diversity and strategy to the game, rather than the one specific squad owns everything. I'm totally cool with Traya because shes like the ultimate prize right now. But why handicap a jedi healer like that, it makes no sense and more importantly no dollars.