Listen... I'm looking forward to there eventually being a Bossk in game (shocking!) but I'd be as opposed to something like this as I currently am to the Nightsisters "rework"
Don't force people to farm the crap out of undesirable toons just to get a potential meta character. Or, at least make those potential meta characters worthy of it. Of all the OT bounty hunters, Boba Fett would be the one most deserving of that treatment, and honestly, in my opinion he falls well short.
Make bounty hunters fun, bring in a Bossk, and maybe let creative players find ways to make viable arena/GW squads with these characters. Any special events with these toons should make it easier to farm gear or something similar, and feel optional to the playerbase.