gnomo Probably I don't understand what you're trying to say.
The "short" sudo eopkg check command checks all packages, and DOES display check's result for each package, one line per package. It takes about 15 min here.
The "long" sudo eopkg check | grep Broken | ... command also checks all packages, but does NOT displays anything for good packages. You may get a wrong impression that the command does nothing. The output will be displayed ONLY for broken packages, if any.
The long command takes either exactly the same time as the short one, if no broken packages are found, or a few more seconds, if it needs to re-install a few broken packages. While the long command runs, nothing is displayed for good packages.