I have a suggestion for completely scanlated manga excluding oneshots when searching for series. There have been many times when I'm looking for a series that completely scanlated and I have to go through a lot of oneshots before I find a manga that piqued my interest.
That would be really helpful. And thank you for the wonderful site

I would also add the "only show manga on my lists" option. And I would add the possibility to tick more than one field (sometimes I want to search only for manhua and manhwa).