Yeah, I'm guessing they'll have to either re-code a lot of stuff or make cuts - even with vanilla you can make some insanely big inteplanetary ships, specially if you're assembling in orbit.
they cant re-code the stuff that need the cpu, and they cant make it work on ps4 like on pc. amd makes ust to bad cpus...
Considering how badly threaded KSP is, yes they can - specially since it's physics that's killing game performance, so, in theory, they can even put it on GPU - honestly, I think KSP might be perfect candidate for such approach.
Pretty sure KSP still only runs on a single core. Presumably the PS4 version will use multithreading, and hopefully that ends up filtering back to the PC version as well.
Yeah, I'm hoping it will trickle back down to PC as well, very big crafts can really kill fps quite easily.