I just watched vlog 6 over again, and the one phrase that made me smile was "gameplay first, visuals second".
When it comes down to it, the gameplay will be what will make this game the success we are certain it will be. My favorite all time game, CoD2, has managed to keep me interested to this day due to the gameplay and mechanics. Visually, it isn't the most impressive. But that doesn't matter because the gameplay is so fantastic.
Just because so much can be done now to make things visually appealing...doesn't make it necessary. In fact, the visual aspect is the first thing that will get old and boring after a short time. The gameplay will keep us coming back.
You're a great leader with this mindset.
edit: furthermore...glad you are taking your time. No need to release the visual things people are begging to see...wait it out! They are getting it right!