To me, you can do the same things as long as you do them differently for different situations and aren't just working the same match over and over. They're tools. That's one reason I really like 2009 Christian. He uses the same stuff but he always does it differently and teases it for different effects, etc. Bret from 92 also does this a lot.
Now what I will say is that I would really like to see Flair back when he was working for mid-atlantic in front of the same crowds every week. That would be the real evidence of whether or not he switched things up to that extent or if he just did his shit, because as a travelling champion, it makes sense for him to just do his routines. It makes him an unimaginative wrestler, but you can't hold it against him, you know?.