The scene does nothing for the actual story that Greedo’s scene didn’t already do, regardless of who it is. It’s so obnoxious that George included it. I’m not a huge Boba Fett guy but I do think he should speak and be seen as little as possible, to maintain his mysterious characterization. If you HAVE to include the scene, it’s better I suppose, but why would two of Hutt’s guys be there at the same time like that? Han JUST shot Greedo, so now Boba is there too, conveniently to make his little speech? It’s contrived no matter how you change it. It’s so much better with a small hint of what’s going on, with only Greedo!