Aside from this, I see a lot of potential for a great plugin, but all those features Gmelius claims to remove since they are annoying, are features I like. And all the things Gmelius adds to Gmail, are stuff I couldn't care less for.
This plugin is really not appealing to me and I think it's because, to me at least, Gmail is simply great and there is pretty much nothing to add except maybe enable a few Labs options. It seems to me that this plugin is really useless because there is practically nothing to change to Gmail to make it great in my opinion.