It's a common issue with this platform, being AWD but front biased till the it loses grip then Haldex rear diff comes in.
Trouble is it pushes the front out before correcting with electronics but it's too late.
I'm going with all new suspension, standard R-Design dampers to start and a thicker rear sway bar to help the front. Keeping the front bar stock.
Next is Powerflex Black rear subframe bushes then maybe a mix of poly and HD and Volvo links and bushes in rear.
Front will remain stock rubber bushes , HD drop links , strut brace and maybe strut tops with camber and caster adjustment.
I'll get Polestar tune in the hope that it actually does change the Haldex and other electronic guff to help.
Any advice gladly considered!
(At present at 200,000+ km it needs all parts replaced)