Thanks for the feedback!
We have not begun tuning the spacing/padding or colors. These are considered visual elements that we can pretty easily iterate and improve. Our current priority is focusing on the functionality.
As far as your other points, we plan to release customization UI (hopefully this week!) that will allow you to hide any tabs you like, create your own tabs, and put whatever combination of tools on those custom tabs.
I see you’ve left aligned your tabs. I don’t think we’ve exposed this UI yet (part of customization) so are you hacking around with flags?