Hmm, you are not utilizing Q and E at all.
So wouldn't it be easier to put more skills on the keyboard and then use some of the mouse buttons on the side as shift/ctrl left/ctrl right modifiers? so you can quickly switch between the 'sets'?
Idk most of the time I'm playing on controller and I have yet to find a class where you cannot easily put all buttons in a way you can play smoothly, and I have leveld them all.
Since most ppl say it's easier on mouse+keyboard I'd assume it is mostly up to utilizing your buttons and modifiers smartly.
To the topic itself:
I prefer having different buttons for each combo skill, because even tho ppl keep saying that it's "braindead" and "too easy anyways" pressing a rotation it is indeed making a big difference especially in hard content. DPS checks are a thing because ppl are often doing their rotation wrong or don't know it in the first place. It definetly adds a layer of difficulty in already stressful fights and seperates good from not so good players.
It would indeed simplify the gameplay quite a lot if they changed this, imo and I'd rather not see the game watered down even more.![]()