When comparing two Halo clix, the Traits were unlisted, including the Grenade info.

Special Powers and Traits have never shown up when you use the "Show All" comparing of units. I think it would be problematic to include that in the Versus chart because it would space out the dials too much so you couldn't see them all next to each other.

This is just my opinion, but I think it's fine the way it is. If you want to see the special powers and traits, you can still just click on the figure on the left in your Build box.