I doubt that this can be felt if the system is under tension. The question is, what are you willing to invest.
My advice would be: leave it as it is or do “everything”. New rear suspension, new (bearings)/sealing of the “bone” (only two connections have needle bearings) if really needed. And change the one side of swingarm bearings. where the 2 ball bearings are, as they ar not sealed and mine were rusty.
I didn’t change the needle bearings, only cleaned them and put new grease and sealings. Just exchanged the ball bearings of the swing arm and put in new YSS shock absorber.