I've said it before but my "dream" is to move on the YNSE and have the DRL rolling so it opens within a year or two of YNSE. I don't think a ready-to-go subway should have to wait and I don't think there will be enough new ridership in the short-term to make things worse on Line 1. I think waiting for DRL to be done is a long wait and I think building YNSE without the DRL moving in tandem is obviously dangerous to the network.
That said, guessing how and when these bozos will build anything isn't something I'd bet on.