Zelandakh, on 2019-August-19, 04:26, said:
Add 2NT = "good low-ODR raise" and make 3♥ = "good high-ODR raise" for further reduction of granularity. Some, like Nigel, prefer to use the calls to differentiate between 3 and 4 card raises but PBaB generally prefers to divide hands based on ODR.
Oh yeah great point: that makes total sense as obviously you don't need 2NT as naturally when you are a passed hand.