'TW is OP because the spreadsheet says so' misses that TW isn't that OP in actual practice. Beyond the endurance issues limiting the build to certain armors, also consider the lost momentum time due to positioning, missing on the momentum swing, and everyone and their grandmother toting AOEs which wipe out the spawn before you've finished your momentum swing. The level 50 tallies tell more of the truth, its rare that I'll see another TW in the wild.
I'm curious to see what the Cap has planned, TW can still use a little care.