Yea, I don't know what you guys are talking about, the 2.x Onos was still very very strong, even if you did know where to shoot. I recall easily taking squads of lmg marines, and being able to survive squads of shotgun marines without too much comlpication. Also, a civilian: Devour was implimented with the idea that the Onos would become a hit-and-run aggressor. Without stomp and devour, the aliens have a very tough time taking down heavy trains.
I agree with Bob on the idea of reducing the Onos' hitboxes a tad. At the moment, I could be around a corner, out of general site of marines, yet they'll still be able to hit anywhere just in front of my face if they see my horn since the hitbox doesn't align with the model exactly. Also, if any part of the Onos is sticking through a wall or door, like between cargo and marine start on ns_hera, the marines can hit the Onos through the wall.
Legionnaired: As for thinking of new things to do with the abilities, I'd say give it a rest; Nothing we think of will be implimented, especially since it's not like anybody important has listened to the players in a while.