Well I love PF2e and the three action economy, but I hope we don't lose the feel and uniqueness of Starfinder in the rush to make it compatible.
For one thing currently Starfinder has more limited magic, only up to 5th level spells. For another right now we use stamina and RP points in Starfinder. I understand that there are Pathfinder variant rules for this, but Starfinder is built around it, including class abilities relying on use of RP. I can already see how they are trying to change Soldier so it doesn't overlap with Fighter, and I'm not sure I like it. Fighter isn't designed to use technological weapons, and now Soldier is only designed to use AOE weapons.
There is a lot to gain here, but also a lot that could be lost.