I would say hold it for now.
Kylo's zeta is ok, Barriss can be useful on a GR team (but you don't have enough of the team geared yet). With no 3v3 GA in sight for the near future, Bastila is not needed if you'll have JKR as you won't be able to make two powerful jedi teams for now. The others are the type of zetas that you need if you have absolutely no other toons to prioritize in the near future. None of them is game breaking though, and you can probably live fine without them.