Good.
Edit: I'm contextualizing this opinion through a legal lens, pointing to what it really does. From now on, Congress will have to pass laws (e.g. Do Their Jobs) to pass environmental legislation, instead of relying on the bureaucratic executive branch.
Also expressing that this is good, which is a personal opinion, but I think I'm providing value here.
Where is the buck being passed, precisely? To me this reads more as a cynical prediction by SCOTUS (that Congress will continue to deadlock, effectively granting victory-by-default to conservative causes). And they probably won't be wrong in that prediction, if the last decade serves as evidence.
No, it doesn't mean that. The Major Question doctrine only even comes into play on its own terms if (1) Congress has, in fact, passed a law, and (2) the matter addressed by the law is entirely withing Congress Constitutional power, and (3) an executive agency is acting entirely in accord with the law passed by Congress.