I've already replaced lutris with Heroic launcher + proton and wine-ge a year ago.

Lutris install script already didn't work >50% of the time for me and battle.net always completely corrupts and messes up after a time on lutris and I have to reinstall it every few months, but has been going a year strong on heroic.

You can also always look at the lutris install scripts and install those components in heroic via winetricks. They were made by the community anyway.

For games. I have replaced it with steam as you can load none steam games and run them under proton. I have had great success. Outside of games I'm not sure.

Didn't look for one yet. As I understand, there is a thing called bottles that is worth a try

Build one yourself