This is a nice to have but not really essential feature for SteemWorld. There are already great platforms like SteemPeak available that enable us to work with templates and all that stuff, therefore (and because a day has only 24 hours) I currently do not see a high priority for spending time on the editor.

I think this is correct - an editor wouldn't have high priority for me either. However, if you can make a steemworld.org mobile version that still feels light-weight that would be a big win for Steem :-)