maybe And_one (Project manager) can give better info but will try to answer.
Do you want to do in JL 3 more features then in JL 2 ? Maybe more options, modules.. etc
don't know but would say yes but there are no specific details, actually there are already more features. for example there is a tools-view where you can export to CSV. If you ask me then i would also like to modify the code so it will be more suitable for other sports but that's for the future.
there are predictions in 0.93 or 1.5(1.6) version, and I don't know it was a native module or not.. Do you plan this in JL 3 in the future?
am not familiar with it so can't tell (did recently join the project)
At the moment the job at hand is to update the internal code and that takes a lof of time.