If there's a time to make Faber/Edgar, the time is now. Both are still in their prime. If they're both 35+ year olds fighting, it would not have much hype and impact.
"When GSP fought Jon Fitch, he said he was like the terminator, coz he kept coming back. Well, if he thinks Fitch is the terminator, he's gonna think I'm God. I'm not gonna stop." - BJ Penn