wx has a bunch of quality of gameplay features, like night vision early game and extra movespeed. He also has nice features like eating gears, not aggroing clockworks, eating spoiled food etc..
In my opinion as someone who plays him a lot, I think he needs more combat specific skills.
It would be cool if the warbis armor was stronger on him and had some interactions and new features.
I don't think his skill tree should focus too much on his circuits, but if I could ask for something there, I would probably ask for atleast 3 circuit slots additionally in the late game. Also the idea for mixing/hacking/combining circuits would be very nice, as we lost a bunch compared to old wx.
I hope Klei can see this as focus more on combat, he has almost 0 combat features.