er...hi ya'll here's my two cents

bagua, yin style anyways, has center line attack vectors.

but it has various other vectors also. some hidden some open.

None of that really seems to matter really. They're kinda just theories until applied.

but you are right, bagua doesn't seem to be very effective and people resort back to kickboxing.

two reasons
1. lack of training
2. bagua is a style that kinda is formed around modular concepts of attack. Therefore, their natural movements might create a personal style of bagua that looks similar to kickboxing, although I doubt it.