Fountain healing and Inhibitor turrets

Inhibitor turrets are really weak. We all know this. They aren't a threat. Your base is dead. Say you are defending and you are low HP in base, you walk back and you have to wait a good 5 seconds to regenerate while the enemy team, or just 1 person is hammering down on your base turrets. Can we increase fountain healing? I think I good idea would be that if the enemy team starts attacking your base (inhibitor turrets) you get increased fountain healing. Would this be a good or bad thing? I have no idea how this might affect the game... I find it hard to defend these days and actually fight hard to come back. Thanks in advance! :)