Tyranitar's use pretty much depends on how many potions you need to save. Any meta-relevant dragon, SB Mewtwo, and SC Gengar out-DPS it by a fair bit but enjoy no resistance to either STAB, or worse they suffer a weakness to it. Tyranitar is neutral to dragon and resists ghost which could keep you from needing to re-lobby.
I figured this out with the DPS/TDO table. You can still punch in unreleased Pokemon and assign them random moves to crunch numbers. I opted for Hex/Shadow Ball here. All in all I wouldn't be too concerned about it until the stat rebalances come out. DPS rankings may stay consistent but if bulk varies it could push some options ahead or behind others due to overall performance shuffles.