I tend to fall into the same... I call it cover 2, but it's our cover 2 version. But, whatever we choose to call it, it doesn't seem to be working as you mention.
After watching all the game this and last year, sure sometimes the players don't execute, but I really don't think they are wisely put in position to do well.
It is truly mind boggling that we get burned on the same things over and over.
I swear I'm getting vision of Wayne Fontes... This team just does well enough to let the coaches keep their jobs. One game, we look like world beaters, then the next, we couldn't stop a pee wee team. I just think, again as you've pointed out, that it's won/lost at the line. We do tend to just bull rush and hope for the best. Sometimes our great athleticism,etc is all that's needed and we make plays. But if that can be curbed by an O Line, we struggle to garnish any pressure at all. To me, that's just not smart scheming.