Glad you liked it, that's exactly the sort of thing I've been going for.
>Stuck behind the canisters
I noticed this a while ago, then next build of the map shouldn't have this problem.
>Fall Damage
This is a tricky one, at the moment you need to fall about 6 meters for it to kick in which I think is quite forgiving. It's something a lot of people have been concerned about though so I'm keeping it mind.