Love the app! 
One thing: I frequently use ⌥+right / ⌥+left to navigate across words. This works well in Lettera for most content, but for highlighted words (==word==), Lettera moves the cursor into the markdown instead of jumping over the word.
Would be nice if Lettera semantically treated this as a styled word, the same way e.g. bold and italic, and navigates past it, and only “enters” the markdown through non-modifier left/right cursor navigation.
