I don't think it's wrong at all, depending on what your motives are lol.
The menu is different at lunch, so you may want to compare before you make up your mind.
Also, keep in mind that BoG is the only place at MK that serves alcohol, but it's only at dinner (in case that matters to you; I don't know your situation).
Also, it's not TS at lunch... I think they bring you your order, but it's not like dinner at a sit-down restaurant.
Having said that, I happened to snag dinner ADR's, but if not I would have been completely fine with my lunch FP+.