Listen- every single one of your components is responsible for and contributing to the sound you are trying to avoid. Every single one. If you try and patch this over with cables all you will wind up with is a system that still sounds bad, only less glaringly bad. But still bad.
Only now if you keep going like this instead of being bad it will in the long run be even worse. In the beginning a couple months ago all you had to do was start methodically removing and replacing one at a time all the analytical ML, Classe, B&W etc. Each one of these replaced with something good- NOT trying to patch over the others, just better than what it replaced.
The advice to try tubes is well-intentioned but misplaced. Try that and you will look for super warm tube gear trying to offset your super lean gear. Big mistake.
Forget system matching, that is really the band-aid approach. "My system is too harsh, so I will match all my harsh components with syrup." Yes I know that is what everyone says. Well sorry but it is wrong.
This is the way you build a system: forget what you have, focus on what you want. Each step will then be in the right direction. Otherwise you buy a bunch of bloated bass heavy wire trying to tame the other stuff. Eventually when you replace the other stuff you are forced to deal with the bloated bass heavy band-aids. Don't buy band-aids!