Possessed said:

I had intended for it to come off as threepio already knowing they are being offered as a gift. This is why he now just says "And... a gift." He no longer says "Gift? What gift?".

That is a good idea. In that case, you could cut the shot of Threepio.

EDIT: I just had an idea to slow it down a bit. What if, instead of reaction shots, I cut from the shot of the detonator to a shot of Leia's face, glaring at jabba, and then cut to jabba's reaction to it.

That might work. You could also cut to Bobo Fett's drawing his weapon, then cut to Leia-as-Bounty-Hunter's glaring at Jabba, before finally showing Jabba's response. That would have the advantage of giving you more of a reaction from "the room" - as it were - and make Boba's subsequent lowering of his weapon seem more consistent. (We might, of course, have surmised that Boba had drawn the weapon at some point anyway, but leaving it in might avoid potential confusion.)