Now someone just needs to port the BoBaFeTT trainer(s) and the anti-hacks, anti-anti hacks, etc. Can’t wait to see people shooting arrows from their swords, getting PKed in town (and the town being covered in infinite fire and portals), level 1 loincloth guys suddenly equipping King's Sword of Haste and Godly Plate of the Mammoth when a duel starts etc.
If you're fine with playing on Windows/Mac/Linux instead of in
a browser, and if you know some C++, you could go ahead and implement those things in Diablo directly. There's a reverse-engineered codebase on GitHub that the browser version is based on: https://github.com/diasurgical/devilutionX