"It is true -recharge is probably less effective." haha Probably Less Effective!
I agree that it is not fun to be slowed to a crawl. It is AWESOME!
Today, toons are defeated by one or two powers, so I think it's completely fair for toons to be slowed to a crawl. If you're worried about getting slowed, there are methods of survival for your slowed toons. They can teleport away, Jaunt away, Hibernate, Phase or choose to stay put and fight it out.
There are good times for all when we can get slowed to a crawl. Trust me. You'll love it!
Trying make the zones one giant safe space is boring.