But our problem with single mesh is that, the animations we are doing, dont look right, and polygons come out as weird. There is very much streching, bad looking polygons and as the model is rotated in possible angles, which doesnt gives a decent look for the model.

Only a dissected mesh solves problem relating to strechicg and not being subjected to weird polygons. But it has its own issues.

Can there be any good choice, as we are going for bones animations and there is the choice of one bone - one vertex.