Just like how the "Characters" field has a "Characters who should NOT appear" counterpart, I wish the "Hero" field had a "NOT the hero" counterpart.
And on a different note, if want to look up let's say comics that are at least 20 pages long and were reprinted in the German Micky Mouse magazin, that is made very difficult by the fact that comics that were reprinted in multiple parts in a publication are not counted as one story in such a search. Example: the 30 page long "The Last Lord Of Eldorado" was reprinted in two parts in Micky Maus (2*15 pages) and is not given as a result if you search for comics that are at least 30 pages long and were reprinted in Micky Maus, because in that search it's counted as two 15-page long comics instead of one 30-page long one.