zilentworld
It's an option, it might become the optimal playstyle but who knows. I agree that Poe1 have been more diagonally laid out, seems poe2 too from what I see on some of the trailers, especially the mercenary.
Also from playing wasd I don't think I ever found myself having an issue of why am I pressing two keys. Might be an issue long term if I'm blasting but we have to see yet the end game of poe2
The reason you want a diagonal layout for artificial environments is because a lot of terrain features look bad when you have them in cardinal directions.
For example, we have a straight wall bit here that makes it hard to see that there is a door in it.
In this case we literally hung a lantern in it to attract your attention, and it's not so bad. We did discuss removing horozontal doors from this tileset entirely though.
Even in the other orientation though, I don't think you want to overuse it.
It makes for an interesting feature from time to time, but I don't think it's good to overuse.
We played around with other areas having other interesting rotations too..
Here is another one from that angle.
At first it seems pretty cool. There are actually a lot of things to like artistically about angles like this.
What I found though is that that there is something "fatiguing" about playing in an area with an off-axis rotation. It's kind of hard to describe why.
But after removing the angle offset you just kind of go "ahhh, that's better".