Stefan is a lawyer first and a City fan second, which is why he's a credible voice.
Yes, it's nice to see the PL and the ragtops squirm as their confidence drains away but that is incidental to the facts. The facts are as @slbsn explained. In the big picture, this judgement doesn't mean too much for the future as the rules will be tweaked to comply. That's the correct position for a legal person to take imo, he's not a cheerleader.
The really interesting part here to me is that it has been legally established that the PL broke its own rules in how it dealt with City.
Only if reports are to be believed they can't just tweak the rules, those rules have been declared null and void.