A pragmatic and sensible approach, very much agree with the tiered framework with escalating requirements as the level of investment or severity increases. Great work!
My only disagree was on voting requirements, as I think the required level of consensus is a bit excessive and may lead to gridlock and lack of action on anything with contention. My suggestion would be to pare back to 2/3 in favor for normal votes and 3/4 required for emergency actions.