In the dev video, you mentioned how you wanted void gauntlet to be a “support” weapon. In my opinion, I don’t think anyone will “ever” use Baleful Tether.
PVE - it goes away when you switch weapons. For VG DPS, it’s just better to take anything else. For healers, you need to constantly heal, and if you don’t, it is always better to spam light attacks to reset your cooldowns (Will of the ancient + Revitalize). Personally, I shoot orbs and drop oblivion and essence rupture. I can’t see any scenario to pick Baleful Tether over the other options.
(For PvP saying VG is “broken op” - tether is like micro projectile, good luck hitting anyone + there are much better choices).