Providing feedback is TB's job. It can be done either tactfully or rudely. Holding an extended discussion and developing a concensus before pulling the trigger on a vote would be more tactful and more likely to produce a favorable result, IMHO.

If I were on the TB I would only make a formal proposal when I was very confident it would win approval easily. Close votes on contentious issues create stress on the TB and could make future work more difficult. For example, by leading one group of members to reflexively oppose the proposals of another group of members. That sort of nonsense is harmful to the TB and FT.