The 'bouncy needle' as you describe it is just eye candy. It didn't affect me one iota. Geoffrey Wellum adjusted his PP for RPM at 2650 before combat and left it at that untill combat was done and dusted, I don't recall him talking about RPM other than in terms of preparation. (How he managed to set the 50 with a neeedle bouncing all over the place could be questionable though....
)
As for the neg G, I find it far easier to manage in CoD than the Early Spit mod packs for IL1946 which are more sensitive. The needle isn't a big issue and not worth arguing over.