That's a huge insult to Barao.
Faber as BW champion would be fecking ridiculous while Barao remains undefeated and destroying everyone put in front of him.
Nah the insult is to throw a former legend in their with him and have Barao humiliate him. Like say Shogun/Rampage with Jon Jones or Big Nog with Cain Velasquez.
Also big picture Faber/Barao are just waiting for Aldo to move up so one becomes the BM champion and the other contends for the FW championship.
To me I see Urijah Faber as the equivalent of Carlos Condit he's earned the title "former UFC champion" just need to figure out the politics behind it.