Re: brood in super
"drone brood - they won't be able to get through your excluder." That is probably one reason why the traditional inner/outer cover setup has a little escape hatch.
You know you can always leave the excluder out until a few weeks before you harvest honey, and then let the brood above it emerge, and be backfilled. What you can NOT do is take any chance that there will be medication or feed in the honey supers that you extract.
Don't let what might be best prevent you from doing what will work.