Timegating is fine. I actually like it and it extends playtime as they intended. The part that annoys me is that they let the community think these weapons were obtainable when they weren't. They could have stepped in at any point during the great search for SS but chose to stay quiet. I think that if they had put in the armory something like coming soon or something similar instead of "can be found in TTK" people wouldn't be as upset.