Phillip Gruneich, former URL scheme extraordinaire, has now turned to Drafts 4 and natural language parsing:

If you ever used Fantastical or Due, you know that natural language parsing is better than chocolate. Now I want you to count how many task managers you know that implement natural language parsing. Exactly, none.

So, so good. The only downside is that this doesn't work with OmniFocus. That's no fault of Phillip's — the URL scheme for OmniFocus is just not very advanced.