Echelon formation will give you one heck of a blind spot as far as gun coverage is concerned. However distance between formation I agree with.
No need for auto delay of that length, just press bomb release again. Parafrag and skip bomb have no real practical use in game as yet, at least nothing standard ord wont do. AI gunnery is asking for trouble, I could just hang at the edge of the gun range and wait for the ammo to run out.