Collectible Card Game Headquarters

I recently thought that it would be a fun idea to create an EDH deck helmed by a partner pairing of Urza, Lord High Artificer and Breya, Etherium Shaper, with a few cards that are illegal in EDH. Forge doesn't normally allow this (because they can't be partnered). Therefore, I think that it would be interesting to have a "Rule 0" setting that allows normally illegal decks like that to exist.

Does this idea have any merit?

Yeah, since we can already, say, play decks that have 6000 cards with 400 copies of a specific card, why not an unlimited number of commanders too ?