> 1- There is excessive white-space everywhere (like every other modern web-app). I feel like it was designed as a mobile-first solution.

So many programmers have this obsession with interfaces having every available piece of information displayed all at once. I just don't understand the appeal. I find these sorts of interfaces confusing and overwhelming, I literally can't think straight when I look at them. I immediately forget what I was doing due to all the distractions.