Mix and matchable equipment or is each set exclusive?
When is this coming out? Especially the Aegis?
If you want the set bonuses you need to only use 1 set: though the 4th Borg item can be used with the Aegis set, sans set bonuses.
No one knows when it's coming out. That depends on tribble testing. If the Devs get enough feedback over this weekend they might throw it into the end of the week patch. Otherwise maybe next week, or right after the new year.