I never do asparagus rockets, at least not with more than one layer. The way I see it that fact that asparagus rockets work in the game is a bug, in reality they would be slow and unstable. Eventually they will fix it. I must say though mechjeb doesn't work well with massive multistaged rockets, it usually sends them into a curly-cue spiral after a couple thousand feet. So I pretty much have to drive all my rockets to orbit by hand. The most fun is getting those asymmetrical parts into orbit.