It has its advantages and disadvantages.
There are some spells that are worse on console than PC and probably the biggest one is something like Teleport where the game has to use rule based logic of “go forward X distance” whereas with KBM you can click anywhere in range.
Most skills though either require slight movements to perform similarly (sending wolves at a distant enemy for instance) or doesn’t change much at all in execution between KBM and Mouse.
On the execution side the game highlights what minion is “selected” to be the focus of your ability. It actually helps some skills (Rapid Fire as an example) and changes exactly how others are used sometimes which will likely impact PvP more than PvM.
While not D4… I’ve actually moved to playing D2R more on console than PC because I prefer the controller for movement. Similar on D4 that it just feels a bit better, to me, on Console even with some of those slight issues listed above.
Edit: Note: For melee classes controller felt better. For the limited time I spent ranged classes KBM would have been better.
Hope this helps your decision some and if you have any specific questions feel free to ask me. I played D4 on both (although starting Console personally) and play D2R on both.