1. Meh. Don't use it much. Don't care if someone else does. I've seen plenty of savvy players take em out.
2. Perrin nailed it. A few nights ago, I was capping in an indoor sky base that's fairly easy to cap in ghost if you're on the right side. The flag is literally just a couple of meters from a wall. Viking (or a smurf) tilted and started screaming about cheating with multiple votes to kick me. Laughed my ass off.
3. I've been taken out plenty of times by savvy players while invis in chem. I've been taken out plenty of times by savvy defenders while trying to grab the flag in ghost. Don't see an issue.
4. I agree with DaRk
5. I agree with Ero.
6. Plenty of D gets destroyed by savvy players. Don't see an issue.
7. It's pretty balanced as long as skill as balanced. Talented titans all stacked on one side and sniping then it's pretty much why bother spawning.