Agreed with all the suggestions but especially this one. Make it clear in-game.
I made my team last minute last night because I didn’t realize GW was this week, and was kindly reminded by my guild before time was up. I forgot about the replacements so now my defense team is using a bad weapon. Oh well I guess.
While on this subject, monthly reminder that this was said to be a temporary change. It’s been 11 months now. While temporary can be any length of time depending on the context, it doesn’t really feel temporary when we haven’t heard anything about plans to balance Stellarix or WoS.