This more like a DnD 5th edition issue more than a game issue.

And also not sure how it would riled up DnD fans because game added non-PHB/supplementary books rules.

I think our best bet is for mods.

Councellor Florrick's favorite Warlock.

Back Black Geyser's DLC: https://www.kickstarter.com/projects/grapeocean/black-geyser-dlc-tales-of-the-moon-cult (RTwP Isometric cRPG inspired by BG1).