Jumping Orkies is OP enough, and now you want to make it more OP? TROLLLLLL...
In all seriousness, this may actually be a bug...or it may have been intended since the things are already so damn powerful...you'd really have to get a dev response on it....
That being said, I just find it funny because even if it is a bug, it's probably for the best...
I'd be more concerned with modded versions than with vanilla...I can see some people wanting a modded faction that can both jump SBs and have multiple SBs in gravity wells, and this could screw things up real nice...