Does Cora really not want Raffy at 1B? If Devers was open and willing to move to 1B would Alex Cora be against that? I don't think he would have a problem with it.
Also the whole "brez do his job" well he did his job, Sox had a young player regarded with a lot of potential in Casas but he got hurt. Most teams in Brez's position would either call next man up (Toro), trade for a guy, or move someone on the roster to 1B.
Can he really trade for a guy? we seem to go through this EVERY YEAR, not me and you just the fanbase in general, but we always want trades to happen in May and they just almost never do. Most teams are still trying to figure out if they're buyers or sellers and will likely wait until July to do so. I'm not really sure what more Brez could do other than grossly overpay for someone, and even then who knows what is out there.