Besides the shooting star press I really don't know what else Bourne has to offer. There's obviously been some smaller dudes that have gone on to have great careers in WWE, but they usually had something to set them apart. Guys like Mysterio, Benoit, Jericho, etc. I know comparing him to to some of the greatest wrestlers ever might be dumb, but I'm just saying I don't see Evan Bourne being anywhere near the main event in the years to come. Like I said, his signature offense basically consists of the one move (which he hits maybe better than anyone to his credit) but other than that there isn't much too him. It's not like he's oozing charisma either. Having said all that, combined with his wellness violations, I don't think he would be a huge loss and I would probably let him go.
If I was going to keep him I would either have him upset Cesaro for the US title and have the two of them feud over it for a while, or I would have him wrestle Kofi for the IC title. Having Cesaro lose the title to a somewhat well known returning guy in his first match back and then go on to feud with him over it might add something to the title. I would also love to see Bourne go for a shooting star press and eat an uppercut instead somehow, that would be rad. If I was going to have him wrestle Kofi I would have Bourne come back and congratulate Kofi on all the success he had when Bourne was away. Then have Bourne ask for a title shot which Kofi agrees to and in the match, Bourne cheats to get the win and the title. Then have Bourne say something like he was pissed Kofi replaced him with R-Truth the second he was out of action and as revenge he decided to take the IC title from him. I dunno, something like that.