I have an index (but not slimevr/giggletech) and didn’t have issues other than the overlay was buggy when trying to view the desktop. That was a year or so ago though so may have improved.

Helldivers 2 works on linux

You can just put a blank file in the Templates directory then it shows up in the right click menu. At least it does that on PopOS

After switching about 3 years ago, I tried running photoshop through wine. It was a little glitchy visually (I hear it’s ok nowadays though) so I tried gimp and just couldn’t get used to it. I tried krita and its perfect for what I use it for, very easy to use coming from photoshop. I’m not sure about actions as I don’t think I used them in Photoshop but it has plugins so you might be able to find something to replace what you used before