Yep. He's been fairly regional in the college games he has worked, but I could see him become a top one in the future who does most the big national game broadcasts.
I don't know about him ever elevating to "Tier 1" type Joel Klatt/Spencer Tillman status at FOX, but he certainly could get into "Tier 2" Brady Quinn territory. Currently, he is working what I would categorize as "Tier 3" or "Tier 4" games. I think he had Nebraska-Iowa this year which was a nice stand-alone Black Friday game. I also don't think he gets a game every week, just most weeks.
Not to nitpick, but his work on FS1 is
not regional. FS1 is a national cable outlet that hits 80 million+ households in the US and is not regional. Leber has done games in the Big Ten, Big 12, Pac 12, and Mountain West, so basically all over.
As you've mentioned, he is very good. Does his homework.