I'm assuming that either the scientist or leader will be have some sort of ability to help detect cloaked scouts, thus forcing them to be a little less reckless in their movements.
I also imagine that hover will be more useful when you can unlock the "greater damage when hovering" perk. I get the feeling that if you combine that perk with the ammo beacon, which also increases weapon damage, you will be able to kill insanely quickly.
Again, I really just wish we could play a couple games with leader/scientist before plopping down $60 on the final game

I really want to get this, but I also really don't want to get burned.