Why doesn't pve have pvp combo structure?

[Vahlnir]

I still cannot understand where's this so called "button bloat" some people talk about.

On GNB I not only filled up my 2 crossbars (I think cycling between any more than that is a bit overwhelming with a controller), but also another I made myself which is only accessible by pressing 2 buttons at once on my controller to fill up another 4 slots to use. It's doable, but it took some getting used to. I think some people need to learn how to better configure their setup, but I can also see how it might seem like a lot to look at initially. I do think it helps that instead of just tossing in another skill to use, they are building on some of what is already there and upgrading those skills to save on having extra bar slots.