I think the hang up people have with the bubble screens is actually illustrating the real problem with the offense.
Scheme wise, we were built to get to the line quick, spread out the defense, look at what the defense was cheated towards, and go away from that.
Where it broke down was in the look at the defense. I think our plays looked like read options, but were predetermined play calls. Either that, or all of our QBs were just really, really bad at making the right choices on their pass and run options. The bubble screen became this symbol of the flaw in the offense design, not because it isn't sound (lots of teams make things happen with bubble screens) but because we weren't doing it because the read suggested it, and when we did it we weren't all that good executing it anyway.