I trust the FO has a pretty good handle on the chemistry of the clubhouse and will keep that in mind. If they decide he won't sabotage the clubhouse, then I trust them. The Hader thing was more being shocked at trading a key player, whereas this would be adding someone for the final stretch run.
In the end, we're getting next to nothing from the 3B position right now and are also forced to play Turang against LHP.