I don't care if Bloom gets blame for this move or not. I think he should get blame for the Ward move and I have said as much over and over and over.
Song is a great unknown. We have no idea what he will look like at Opening Day. The Phillies should try to stash him on the roster, but I'm not sure if it's the best use of their roster if they are really trying to win a WS this year. Should the Red Sox have tried to stash him? IDK. If they had stashed him, but still let Ward go, there'd be a certain segment that would have lost their minds over keeping Song over Ward.
It's just going to come down to what happens with Song's career over the next 2-4 years. Maybe the Phillies stash him and he has a 6.50 ERA and throws 92 with weak secondary stuff? Does that mean Bloom made the right call? No, because the Phillies would still have 3 more option years to groom him in 2024-26 and see if they can turn it around. It's going to be a decision that will take a long time to hash out, unless he just gets flat out returned.