A great feature would be if InDesign could add hyphenation rules automatically when when using discretionary hyphens. A pop-up window that asks if you want this word to hyphenate on every instance of the word where you insert the hyphen the first time. I find it a bit too tedious to make new H-rules for every word. This is very relevant for non-english languages where the the pre-defined H-rules isn't very good. There is probably better ways to to this, but I think its time InDesign's hyphenation feature get a little bit smarter.