No, his legacy's pretty much cemented.
He has every record imaginable in the UFC and is easily the most dominant Champion for now, I think if Bones stays at 205 he'll shatter those records but that'll take a while.
2013 VIP FFL Champion
THE RETURN - 9/27/14
Machida - Alves - Cruz - JDS - Weidman - Pettis - Edgar - Cowboy - Dodson - Okami