D&D 5E Advanced D&D or "what to minimally fix in 5E?"

[MichaelSomething]

The OP would, of course, rather pay WotC $60 to write it!

May I suggest hiring MichaelSomething's TTRPG Lobbying Service? For a fair market priced fee, MichaelSomething's TTRPG Lobbying Service will organize a large scale campaign to convince WOTC to undertake your preferred action.