Yeah, and sell it. I would definitively pay for this game improved.
I think you can focus on developping your mechanics before making a tutorial. Because if even without one we are able to dive in and enjoy it, that mean it's not needed yet. And if you do it later you will have a better global vision of your game and be able to make a better tutorial.
(please more campaign, more differenciation between unit types, and ability to retreat !)