I think the worst thing about this is that they are taking a lot of the skill out of Rakan. Weaving Rakan's mobility with his ultimate and not getting blown up instantly (since he's so squishy) is what masters of Rakan are good at. Bad Rakans will go in and die, or go in and not charm anybody. Now all you do is run around. Not only is it not very skillful, its not fun either.
He gets a refreshed ms bonus now, but there's only 5 Champs he can proc it on, and a decent Rakan engage is probably already charming like 2 or 3 people at once, meaning you don't get the optimal duration most times.
They are making it so you can potentially just kite him around like a juggernaut, but he's NOT designed like a juggernaut who can deal with that somewhat. I like how he can still cast Q, like anyone is going to stop long enough to cast Q and waste time when they're already being kited around.
I understand that he's strong in pro play, but there has to be a better change than taking a dump all over the most fun and skillful parts of his kit. Maybe only gimp the R>W combo, since that's the strongest part of his engage. Make it so he has to W in first THEN ult, lock them out of the charm during W or something, but don't completely take away his mobility during ult.