The structure and strategy was not quite right so we shut down, not intending to come back, so we (mistakenly) cleared everything. Then right after a lot of people including some investors reached out to us asking for us to restructure it a little and bring it back. Lesson learned :(
It has become a best practice design style for left nav interfaces. It's a good idea to separate the page with contrast, which often results in a dark left nav and white main section.
That's good feedback, it definitely changes from user to user and what their role is, which is why we're making it an option for the user. They'll be able to go between Comfortable, Cozy, or Compact for card designs (stealing Gmail's wording for this).
That's good feedback, we're actually already working on a user setting for how the cards are displayed and spaced. Like Gmail settings (Comfortable, Cozy, Compact).