I think it all comes down to how comfortable he is and the players are with him, whether it be in the box or on the field. I'm curious if he stays up there a whole season. I can only think of two occasions where dropping the pass rusher into coverage worked for us. I'd rather they go all out after the QB because its widely accepted by everyone here that our linebackers can't cover.
What worked with Spagnuolo might just not work with Sheridan. Remember when John Fox left and Johnnie Lynn pretty much kept the same defense in place...that was a fun season wasn't it.
I'm curious to see what Sheridan can do and personally, I like the coordinators on the field too.