Doesn't mean a thing. Lamar Louis has shown he's way ahead of Welter in terms of talent, yet he rides the pine.
I wouldn't say "way ahead". He is a much better athlete than Welter to be sure, but he has had multiple opportunities to really take the position over but hasn't shown much.
If he was head and shoulders above DJ, both in practice performance and games, I have no doubt Chief would have him out there.
He, just like DJ, has shown no real instincts for making "runfits" that are up to snuff. You can coach em all you want, but a great LB is like a great RB, they need to have the instincts to "run to daylight" to be able to be effective in stopping the run.