The change in how decloaking works also changes the viability of pilots and upgrades that allow you to modify your movement during the action phase. Since the decloak movement has already been done before any movement, the area that the Phantom will end at has shrunk. This means that ships with the ability to modify their movement dial can now possible adjusted to be in a good position to shoot at the Phantom during combat phase.
Stay on Target may actually be more useful than just being on Keyan.
I'm not about SoT on the phantom: it had potential when you had Super Barrel Roll instead of Cloak, but now it's no more useful than it would be on any other ship: less so on a ship with a TIE fighter's dial I think.