several important changes for users of "SfePy as a library to build apps" will be in the next release of SfePy (to be soon) and are already in the master repository. Those are:
method independent (now in sfepy.discrete and sfepy.discrete.common) and FEM specific (now in sfepy.discrete.fem).
more thisStyle.py modules, only this_style.py).
If you have any feedback, do not hesitate to post.