I think that some of these suggestions are good and worth trying out. In general I think having smaller rewards frequently is the way to go. Timewindow was a mechnism to prevent "bluesuit capturers", making sure that the faction that controlled the town didn't have to be awake 24/7, this was however before the notification system (countdown) mechanics were in-place, so it's not certain that we'll have the same problems as then. Again, this needs to be tested, tested and tested a bit more. The reason why we've been waiting with changing the current TC is that we've need more feedback so that we can truly improve it instead of just making or worse, or invoke the "they changed it, now it sucks" phenomonen.
This suggestion will not be implemented before wipe, however.
About town control reward:
Currently equipment of one soldier put for a town control fight is worth more than the reward itself.
I'd suggest changing reward from caps to some items that are unavailable otherwise, or very hard to obtain.
This was already tested, in some sense, by having excess items that were traded in the town and things dropped nearby in encounters transfered to the town. It didn't really work out as well as we'd hoped, so it's not likely to return.
What I'd like to see, is some suggestion of how to truly make TC into town guarding, where the players don't benefit by gridcamp killing random bluesuits that enter the town. This is harder than it sounds, as we all know that a bluesuit may either be a scout of an enemy faction, or simply an innocent loner.