Obviously the main issue in Taiwan is China relations.

Usually minor issues can find representation via multiple parties in Europe. Two parties in the same "Chinese independence" coalition could differ from each other on more minor issues.

From what I can understand from skimming Wikipedia, I guess NPP fulfills this role a bit, but it's tough when a majority of the seats in the legislature are decided by FPTP.

Taiwan probably needs an electoral reform towards a more PR-based system like those found in Sweden and Germany.