Bastila's zeta is quite good. However, in the addition to the fact that her zeta becomes obsolete in a JKR squad, BS lead is already amazingly awesome without the zeta. So if you're still at the early stages of developing your roster, the best choice might be to spend your zeta elsewhere.
However, that being said, in GA and TW, you don't always need BS with JKR at all, and JKR goes great with the pedestrian OR toons. Meaning you can build two very strong separate teams if you zeta her lead. But then you still don't really need her lead zeta for that either. No matter what you decide to do in this you can't go terribly wrong. Just try to prioritize building not just one, but three or four viable squads. Usually that means at least one zeta per squad so plan carefully.