Personally, I just think that Krrsantan’s introduction could be the bar scene. There we discover that he was a really strong ex-gladiator and stuff, giving Boba a good motive to wish him in his team. I agree with szopman about cutting the scene of Krrsantan attacking Boba, since this scene happened just because the Hutts ordered Krrsantan to do it, witch doesn’t make much sense since they help Boba hours later by giving him the Rancor as a present for a non believable reason. Let’s be honest here, the Hutts are totally useless for the narrative in the series, except for the Rancor. I think that it will be much better if their motivation was different than what the show gave us (just my thoughts though, I respect your take too on the way you handled this part in your edit).
About the flashbacks, I have a suggestion on how you could get rid of them without getting rid of them, necessarily talking about. Maybe you could add one big flashback sometime in the first act of the edit, introducing it on a specific moment of the narrative where the present situation makes Boba remember his past with the tuskens, and end this first flashback with a cliffhanger. Then, in the rest of the edit, you could add the second flashback that will resume Boba’s past in another appropriate moment, one where it makes sense for the present narrative. Of course this is just an idea, I don’t know if it would work for real in the edit.