The very first source on Rose changes is here: SUPER STREET FIGHTER IV Wiki - ?4???
If you don’t read Japanese very well, Google tries to translate it for you into:
That sounds like a nerf. But stating it like this it can’t actually be possible as U2 doesn’t even have any invincibility at all in SSF4. My early guess is that she gets some recovery, which would mean she can’t block anything meaty, and thus will lose or trade against meaty attacks upon activation.
Please post any updates you find
update: after discussion the guy reporting this change might not have known that Rose loses to meaties if she doesnt block due to orbs placement after activation.