I mostly shoot it at 200mm, and I'd mostly shoot a 50-150 at 150mm, so for me it would be a fine alternative.
If you mostly shoot it a 200, it's like if you preferred a 120-300 to a 70-200 in FX, so you're not somebody who is looking for the "70-200" concept.
I think most people who are buying it for DX is by inertia or because they want a "300" lens.