nano isn't very weak, I have modified nanorc substantially and also have binded many keys. It works better than, say, notepad++ on windows.

For those who aren't touch typists, or occasional users, nano is just more comfort than vim or emacs.

And there is a editor named `micro`, which is similar to nano but has more features including bracket completion etc.. I am delaying switch because it is written in go (being unavailable in repos) and anyway I haven't found time to configure it. But it is scriptable in lua..