Give Umbra Beast a travel power
It's only Mastermind pets that get Super Jump, because MMs range from underpowered, to outright sucktastic sitting ducks without their pets with them, and it's prohibitively time/end consuming to constantly recast them.
Only three Control Set Pets get a travel power; Singularity, Phantasm, and Haunt(Shades), which have fly.
Fire Imps and Gremlins (and Haunts as well, though I'm not sure why if they have flight) get a boost to Jumpheight(300%), Jumpspeed(5%) and Runspeed(60%), but that's not large enough to be considered a travel power.*
That said, if they wanted to give all the control set pets a bit o added mobility, I wouldn't complain.
*For comparison, Mastermind pets' Super Jump is a 2780% boost to Jumpheight, nearly 10times as much.
Every pet that comes through seems to have superjump at the very least. Umbra Beast gets nothing. He should have Teleport to TP up to where you are, or grow shadowy wings or something. If you don't want to get creative, give him superjump. He just looks so stupid if you go up a building that is just a hair too tall, and he can't find the steps. He does the whole "hop on a ledge, fall down...hop on a ledge, fall down" thing. It's funny when imps do it. It's not funny when an ominous beast from the Nether Realm does it.