Haha nobody cares about Phillies-A's.
Phillies-Orioles felt like a legit rivalry - especially for fans in certain parts of PA and MD - but that probably changed some with the Nats.
Yankees and Sox they love having for the ticket sales.
Phillies-Pirates is the one that's still a big loss.
It's tricky because baseball is built around the series but with realignment and universal DH it is probably time to have every team in both leagues play every other team, like the NBA and NHL. Could do alternating years home-and-home or two two-gamers.
And with eight playoff teams (which will surely be permanent) they should probably go back to two divisions (top two from each plus wild cards or just the two winners and six wild cards, depending how the schedule works).
Between the virus and the claim that they are losing money and not really knowing what the 2020 schedule looks like it also wouldn't surprise me if there are the East and West divisions don't play each other next season. That's the change you might see reflected in interleague too.