Impeachment is the equivalent of an indictment, and the subsequent trial and removal is, probably correctly, very difficult to attain. That leaves a vast area of things a president shouldn't be able to do because it's illegal, but there isn't proportionate recourse.

The next Congress and the next president have a job to do there.

Emergency powers should only exist for things that need a very quick response. There's no reason for tariffs to be an emergency power. There's no emergency so urgent that it can't wait for Congress to convene and pass a law enacting the appropriate tariffs. The only reason that power exists at all is some mixture of Congress being too trusting of the President, and Congress not wanting to actually pull its weight in the government.