Don't think it's anything that can't be smoothed over.Arrowhead would make sense, even if it's just to make sure some other company can't come along and offer them a bag to make a multiplatform spiritual successor to Helldivers. But after everything which went down in recent weeks I'm sure there's quite a lot of distrust from Arrowhead to Sony.
If anything, the fact that PlayStation reversed course so quickly means they do take on feedback from both the public and devs.
But i kinda get the feeling they want to stay independent.