No. Armor tanks permarunning their armor reps and armor hardeners will be a real nightmare. Cooldowns simulate capacitors by giving you a certain amount of runtime before your capacitor runs dry and you need to wait for it to recharge. Although this is not a better alternative to capacitors, we will just have to wait for capacitors.

I think he means the optional deactivation that occurs when you select the module again while it's running. If he meant what you thought, he probably would have said Cooldown - and that would have been a problem.
The reason he mentioned "no cap yet" was because the option is there for later on when cap is running out, and feels it's unnecessary to have it implemented at this time. He was probably running a fit that used hardeners and boosters, and accidentally turned one of them off while trying to activate the other.
While we're on that subject, our vehicle PG/CPU will need to get a good buff when cap and relevant modules are added to the game, and especially if Turret cap requirements act as expected from EVE experience.

No.
there is no reason to make it where u cannot turn of ur module when ever u want if i want to turn off my module 7/10 times i have a good reason for it i rarly turn it off on accident. and my reason for keeping it the way it is some times you get hit and you can make it outa ther area before ur even finished with half ur cycle and i turn it iff to begin my cool down just incase the guy who hit me gets back in range and i need to reactivate it instaed of waiting for the full cycle to run then a cooldown when i may have only needed a half or a quarter of the rep. there is no point in running a full rep cycle if u dont need to.

No. If you knew what the heck you were talking about you would never suggest such a silly thing.

Source: 4 month experienced vehicles pilot.