Too much or Fine the Way it is?
Marines seem a lot like bunny rabbits to me. Whenever a skulk comes trapzing down the hallway they start bouncing around trying to avoid their prey. Which works surprisingly well because the skulk is forced to look up to hit the marine and before you know it they're watching the ceiling and have lost track of their target. Meanwhile, the marine has continued to fill them full of lead. Also, the bouncing will cause the skulk to run underneath the marine and because the marine has god-like balance he can just run across the back of the skulk without falling over.
To me, marine hopping (not unlike CS) has gotten out of hand. If a marine jumps around they should have their aim go to hell, and they should definately get tired when they jump constantly for a minute straight. Also, if a marine jumps on top of a skulk they should fall down and knock the skulk down with them (you're jumping onto a moving creature and not to ride it either--you'd fall). Jumping over an attacking prey just because your bounding box lets you isn't right at all.
Do you believe that marine hopping has reached an excess? Or do you believe it's fine the way it is? Why?