I’d have to imagine considering making those territories have the ability to build major complexes would be a bit too steep and game altering. It’s an interesting rule though! I like the idea of just producing one more IPC, but not counting towards industrial complex strengths. You can make it so they can be bombed as well and have to be repaired, like any other facility as well. If it’s bombed, you don’t get the bonus income until repaired.