Just for the record, I was pl'ing a little last night with some friends for a little while and realized that this fix only fixes one thing:
The Pleveled person may not leave his computer.
In no other way was I in any remote danger following the crew around. It's a piece of cake to avoid getting near any mobs that might aggro on me. Heck, with flight all I had to do was hover a little ways over the fight with no risk to myself at all. And that's a 14th level power, yes? So again, if the end-all-be-all goal was to keep people from pleveling while afk, then it works. But other than that, not so much.
Come to think of it, this is easily remedied too. Just have whoever is SKing you stay far enough away from the fight, but close enough for exp. Then you auto follow them with a keystroke timer thing to keep you from autologging.
So what is being fixed again?