Is PC Dead Space and Jedi Survivor abandoned by EA?

Jedi Survivor's performance issues are annoying but I wouldn't call it "unplayable" by any stretch. It depends on how you define it. My definition of that would be either "literally doesn't launch / hard crashes consistently" or "massively fluctuating frametime on appropriate hardware and settings that makes the intended gameplay too difficult to enjoy".

In my experience, it's mostly traversal stutter and TAA ghosting at low frames in the giant hub level which you don't really get during actual combat. I also partially inflicted that on myself by choosing to play on max settings with RT and no FSR. I use a R5 3600, RX 7900XT and 32GB Ram.

Obviously, your mileage and personal tolerances will vary. Definitely consider the refund window and use the big city vistas of the first area to judge if you'll enjoy it at that performance / quality level you choose. The art direction is really good so I think it will hold up on lower settings.