I have Ideas to improve either to fissure, forest of illusion, or rock trap.
Idea #1 how about player controlled cannons? They would have limited health and might be something for those who are not good at infantry combat to do.
(Remember cannon or turret; not pill, not flame, not m60, nor machine gun.)
Idea #2 (fissure only) capturable oil pump? It allows some who don't like infantry combat to instead go for a moneymaker.
what do you guys think?