If Congress had their shit together enough to reign in the federal courts, there wouldn't be so many federal laws that were ambiguous in the first place. Not sure what the shockwaves of this Chevron decision will be, but I am a fan of forcing the legislative branch to legislate again.
This isn't going to make Congress write more legislation. No politician that was extremist is going to start compromising and proposing legislation. This simply shifts power from the executive branch to the judicial branch. It just makes the question of which party appoints federal judges even more important in the outcome of senate/presidential elections.
They could expand the courts, institute justice term limits, or in this specific case, pass a law that says ambiguous terms in a law are to be interpreted by the Executive branch. If they are lazy, they could probably just stick in a clause that says the specific rules for this section will be created by the EPA or whatever relevant agency; and that would also comply with the ruling.