Actually, Melson was the acting Director of BATFE, this is his boss reassigning him. Which kikcs everything up a level, at least--and there aren't too many levels left in the food chain, there.
Imho, if Holder has been speaking to this issue under oath, they probably have him cold on perjury, but they're looking for bigger fish to fry.
An optimist would say break this wide open in the Fall, get both houses, and impeach the usurper. Heads should roll all the way down the pile, but I doubt it will end up that way.
How about breaking it wide open next summer? Especially if Issa can connect the dots to Bambi.