The judicial still has significant tools to stop an executive branch that is clearly acting illegally. So does the legislative. If these branches don't leverage those tools, or those tools don't work, we have bigger problems.
Guess what: You're living in the world of bigger problems.
The dissent on this court decision beautifully reasons why there is no practical recourse for the judicial branch to intervene after this decision. The effective power to do so is now solely with the Supreme Court. But the procedure is such the the Government can simply prevent any relevant cases from reaching that court because in order to get there, the Government would have to appeal and they can just consistently choose not to do it.
Guess what: You're living in the world of bigger problems.