Opening up the test server is not possible until we get stable version.
It's not even about testing new things which would appear, because they have been already well tested. It's about refreshing the state of the server which currently suffers from old bugs/balance issues which were fixed long ago (like enormous amounts of caps from banks), a large flow of top tier stuff which started with NR/Warehouse lockers, and new issues like -AP TPRs, gecko ammo, fully implanted tanks and other things. Remember that I wanted to wipe the game almost one year ago, but was unable to do it, nobody planned this session taking so long. I'm pretty sure that server reset would be a good temporary solution to fix many problems until the real next session.