When we blitz our coverage sometimes completely breaks down and guys run free.. When we rush 4... it still happens sometimes, but less. So maybe we just shouldn't blitz on 3rd down till we figure out how to blitz and not have guys run free consistently.
Personally I'd rather hope our front 4 can get pressure then up the chances of a massive coverage break down. This is why i liked 'keeping it simple' on that 3rd down call. Rush 4, play tight coverage with help over the top so they can be a bit riskier. I think that is the way to play a bad offense.