1. Markdown in-preview code block syntax highlighting
2. In setting put an option to save the default display screen (either edit mode or preview mode) when opening the file
3. Add  CSS for markdown as a theme in the setting menu this theme should make its effect in preview mode not is editing mode

I just got Textastic for my iPad, and I have to say it's pretty great - it even handles Clojure - my language of choice... and the Automatic brace/brackets is a great feature, but with Clojure, it'd be great if there were a key that allowed me to Jump to the balanced partner of a brace {}, or paren (), or bracket []. This has the effect of "bouncing" between two points in the code - the start, and the end, of the pairings. It's very useful for languages like Clojure where there are a lot of parens...

This is very useful in Vi and Sublime Text 2/3, and a lot of other editors... and I'd really love for it to be added to Textastic for iOS/iPadOS. 

As a web developer, I would love to see a feature in the next future update that adds a "split view" so that I can see the design of the website on one side while I code it on the other.  I use Adobe Dreamweaver on my Mac and it has a feature like this.  I use Textastic when coding from my iPad and I would love to see a feature like this.