As I say all of this I don't want you to to think I fall under the impression that rogue restealths aren't huge or game breaking etc.. let alone easy to get in most circumstances due to whatever it may be..
this guy saying its not easy to get re's against druids... sure if they are feral, which you don't see much.. other than that just coordinate with your healer and be on your way.
What I'm trying to get at is, capitalize on it, if he does get a restealth .. as dumb as that sounds I guess?.. if you let him get one off, push his team if they're in the position to do so, if not... try to delay as he's opening.
Could always look at it like this as well... when the rogues going for a re.. if you cannot stop him, flip the switch on his team mates and make him potentially waste that re... in this day and age if you do it right you'll come close to just globaling one of his partners if they're out of position.