Ono's

Shadow58

How about letting the Ono's have an ability to attack marines that tosses them 4-6 feet. and increases their speed by 2x.
Also have their front become 2x-3x stronger and by that it's 2-3x harder to kill if attacking frontal. But making his rear 1.5x weaker, so that the goal for when he's in this mode, is to attack him from behind or else your seriously in danger. also including that it last for up to 20-30 seconds and has a 45-60 second cool down, which helps if you survive his rage.

Ono's can bust open doors, they look epically strong, and it only makes sense for them to have a charging ability that can do some serious damage. Though with this they can almost seem unstoppable or unbeatable, and making his rear be the weak spot would be ideal. making them focus on not being surrounded or snuck up from behind. to stay continually moving this will stir fear into the marines eyes, and turrets will prove nearly useless when meeting this epic foe, but even the strong have their weak points.

Harimau

There was a discussion some months ago, about the Onos and his charge (which is definitely in, with momentum!). The idea is that the Onos's charge would be its RMB skill, and it would accelerate very fast, doing damage based on momentum and knocking marines around, but to counter this, there'd be a turnspeed cap where your turning lags behind the mouse (think the Halo vehicles). So if an onos is standing perfectly still, or moving with the WASD keys normally, turnspeed would not be affected (he could rotate 100x in a second if he wanted), but if he started charging, i.e. he's faster than his base movespeed, turnspeed is slightly capped, and the faster he moves, the lower the cap. Damage should also be proportional to charging movespeed. This would make it easy to charge down a hallway and do damage using charge (the longer your run, the higher the damage), but take some skill to weave among corridors (as you would have to decelerate, and/or just have the foresight to make larger curves).

Also, this isn't 100% certain, but I think they are planning for the Onos' back to be weaker than its front (the reason for its bone armour).

Shadow58

Sounds good to me!