IMO relase it with tracks you have now (main audio, 2.1 bonus mixes - isolated score, commentaries and all other cool stuff in english) and all subtitles from Project Threepio encoded. Then people could mux in whatever other tracks they'd want (e.g. other language dubs).
Also, I tried to do Polish audio, but ran into a lot of problems. I tried to find someone to help me, but no one could/wanted. I don't know if I finish it, but even if so, it'll take a while.