1. The last team you used to fight with in Space-Time is the team that is saved. So if you change to a TI team, you don't have to worry about that becoming your Space-Time team as long as you do not fight anyone in Space-Time with it.
2. Choza is actually quite useful in Ranked Battle if you build a team around him. He can win a fight single-handedly if he gets buffed enough. This function is here to stay so building up points won't be an issue, just takes patience.
3. Advanced threads are nice to have in a shop (Would've liked advanced refines). It gives *ternative to just buying them with coupons. Once again this function isn''t going anywhere, you aren't meant to be able to get tons of points within a couple days.
4. Purification Runes are definitely the best option in my opinion, but the other stuff isn't as useless as you claim them to be.