Eh I don't think DL coach is much of a problem. Comparing our guys to Bama's is just silly. It's a jimmies and joes sitution, not a coaching one.
We've signed 3 5 star or borderline 5 star DL since Butch came in. All are Sophomores and none have been all that healthy over the past 2 years. Meanwhile Bama's DL is stacked with guys who are mostly in their 3rd or 4th years and were former 4 and 5 star recruits (though I think they do have a freshman and/or sophomore 5* sprinkled in the two deep as well). They lost two DTs into the 2nd round of the draft last year and got better this year. That's fairly impressive for any unit.
Meanwhile the healthy guys Strip has been working with since he got here (outside of Barnett) have been more of the Vickers/Owen Williams/Danny O'Brien/Corey Vereen/Latroy Lewis mold or have transferred (Dewayne Hendrix) or struggled to stay healthy and/or in shape (Tuttle/Phillips/KMac).
If Strip was 3 deep with former 4* and 5* guys who all had NFL measureables, I'm sure most of us would be calling him a top 5 DL coach. I don't think he's an elite DL coach by any means, but I do think he's done fairly well with the guys he's had to work with.