Agencies like ATF and EPA no longer have a free hand to do whatever they wish. Additionally, Congress must now write REAL laws, not just general frameworks that are handed off to regulatory agencies. This will make it more difficult to enact new laws and regulations. That's a good thing. The founders wanted law making to be cumbersome, difficult, and slow.

Existing regulations are going to be tested in court where many will likely die without the advantage of Chevron. I predict that the courts are about to be packed with lawsuits challenging decades of regulations in which the administrative state has exceeded its authority. The destruction of the administrative state has just begun.

This sounds a lot like the beginnings of a restoration of our republic to me.
https://justthenews.com/government/courts-law/shooting-down-chevron-deference-scotus-restored-democratic-rulemaking-experts