Yeah it's hard to believe Alfaro and Sanchez alone aren't better offers than what the Marlins have. Though they are probably trying to extract a higher price in-division.
I don't want to see the Phillies get out-negotiated here, but obviously the subtext is, they are willing to give up on those players. We can say we don't think the gap between Alfaro and Realmuto is big enough but clearly their internal assessment is otherwise. And with Sanchez, who knows. He could be anything from a star to a closer who burns out fast to Carlos Carrasco to nothing.
The overall state of the farm remains more concerning, and if they sign Harper and Keuchel, even more so. They still have to turn some of these redundant major league pieces into depth and lottery tickets, at least.
Hopefully this is a lot of noise from the Florida side and they will have to blink. Unless they want to start talking to other teams again tomorrow.