chitzk0i
Explorer
IMO the level 10 utility, Companion Form, should really be a daily, not an encounter.
How so? You can't even use basic attacks without ending the power and all it gets you is speed 8 or climb 6 (the owlbear gives you neither of those, though). Sure, it gives your allies another source for your pet's buff area, but do you really want to go the an appreciable amount of time without even being able to plant a battle standard of healing?
I'm kind of annoyed that the pet is apparently not trained in any skill. Still, my halfling beastmaster ranger|rogue is going to be switching from a raptor companion to a fey panther because then he'll be able to use any rogue power instead of mostly the at-will that gives you CA if you have an ally adjacent.