If Dark Confidant or some other way to run away with a game were included, I would not advocate cutting all the discard
As well as gaining access to cards like Dryad Militant, Destiny Spinner, and Collector Ouphe, adding green can give you both ways to draw cards (Guardian Project, The Great Henge, Beast Whisperer) and search out what you need (Eladamris Call, Captain Sisay)
As a concept, the payoff is really just whatever your opponents are able to do with the help provided
If you do, you get the city's blessing
Couple this with the inequity in stax efficacy, and suddenly pilots may find themselves in positions where each turn as incremental as they may be is benefitting one opponent substantially more than the others