***IF*** you can make it idiot proof. You don't want some moron getting in position and not ever figuring it out. I don't want to defend some A hole for 7 minutes because he doesn't know how to read. It has to be easy to learn, but difficult to master. So Joe Blow can hack it in 1.5 mins, but l33t g33k can hack it in 30 secs.
Another idea could be that the time it takes the base to turn over (the 15 mins now - I know it might change) would be directly proportional to the hack time. So Joe BLow hacked it in 1.5 mins so the base turns over in 15 mins, but l33t g33k got it done in .30 so the base turns over in 5 mins. I know people would be searchin for l33t g33k to join their squad. That would be cool.