@thomashawk I agree with a lot of your points, and I'm reserving judgment at this point. However, there are a lot of design issues that are poor (no way to get back to your home feed or your own profile in a single click, unless you're one click away from it and hit "back), and the faintness of the "upload/cancel/post" buttons, as well as some of the other buttons - and will have to be fixed.
Of course, it is still in beta; I just think we expect more from a relatively open beta these days (when you can get on if you have an invite, and everyone gets 5 invites, that's a pretty open beta, invite-only or not).
But I am choosing to connect with other people I don't converse with as much as I do on perhaps other platforms, and that's kind of nice.
I appreciate your insights and found myself agreeing, for the most part.