Calculated score right now is just pointless, because it's not consistent. It should be like in every other full text search engine - percentage representation of accuracy between 0 and 1. Right now I can use textScore only for sorting, if I want to filter results with more than 60% accuracy I can't do that right now.
Right now text search score is just confising, even more, when you have an array. It should be done like in every other full text search engine.