I think it's a giant giant giant mistake. while tommy may be better at comps, he isnt that much better than them. Looking at final 4 though
If they keep holly, they may have a better chance at beating her for hoh. However, theres a 50% chance michie or holly wins veto and keeps them both safe for final 3.
If they keep tommy, he will still target michie with his vote or noms. they then have a 75% chance for michie to get out after veto. part 1 of final hoh is endurance and nicole has a chance to beat tommy there and then part 2 who knows. Theres a good chance cliff and nicole make finals.
It not only gives the best chance of making it past final 4, but making finals together