When you say 'fixed' do you mean there are a lot of technical difficulties? Or do you mean trying to scour the entire ROM for unintended shortcuts no matter how obscure? It does not need to be 'perfect' in order for us to like it. Don't let yourself become a perfectionist to an unhealthy degree.
--------------------Legacy custom music
How am I so creative? I think taking walks might have something to do with it.
Every single level I will ever make in SMM2 will be easier than Ultra Necrozma.