You're right. Bryan has been watered down a lot in WWE. Still, I doubt Bret watched him very much in ROH as much as he watched him in WWE. So, IMO, he is judging him off his WWE performance and if THIS watered down version of Daniel Bryan can impress someone like Bret Hart ... think of how amazing he would be if WWE let him go ALL OUT.
BTW, Bret Hart vs. Kurt Angle would have been one for the ages.