Your product is really awesome, but it sounds like you are going down a bad path. Playing around with it, I love how it is a good replacement for photoshop, built with the web in mind (classes are crucial so that I don't have to go and change every element every time I make a small change). Haven't used it on a real project yet, but I am planning to. At that point I will probably export out the design and then finish it in code.

Your plans to compete with every CMS out there, plus Shopify sound like a world of pain. I would love to see you guys stick to your core product and make it awesome without taking on that gargantuan task.

Luckily for me, there is a bunch of competition in the space if you guys slip up.