Personally, I would not go for Jump-Pack movement, this seems more like the movement of the Predator ('Aliens vrs Predator' ) to me.
I would substitute Amphibious (+5), Assault troops (+0) and Stubborn (+10) instead, giving a total of 60 points each.
You might want to consider an Acid Blood unit capability : inflict one extra attack against any unit which achieves a hit against the Alien in Close Assault. The target of an Acid Blood attack always counts as being in the open. Acid Blood hits count for Close Assault Outcome results. Acid Blood costs +15 points.
Better shoot them before they get in close.....