After playing some more, I'll expand a little.
Using the sidebar instead of the bottom-right botton worked well in the early game, but once I had more than a half-dozen or so planets, this became cumbersome. I think a filter on the sidebar that makes it show only those planets/ships/etc. that need action would do the trick nicely without drastic changes to the ui. I still think there needs to be a way to end your turn while planets or units are idle.
I still would like to see the tech display overhauled, but at the very least we need to be able to see past research.
Also, when I have multiple ships on the same space (but not in the same fleet) I don't seem to be able to select one of them from the bottom-left display and move it. I have to cycle to it using the bottom-right button, which is a bit clunky.
If one of your ships enters the same space as another while following a longer path, it auto combines the ships into a fleet. Please add a dialogue for creating fleets unless one ship has it's path ending on another ship which has no movement orders.
Will the specialization techs eventually have more than 3 options? With three it just feels like a weird way to present a normal tree, but if there were lots of options (5-8 would be good I think) for 3 slots that would make those techs much more interesting.
Finally, has anyone found a way to add some challenge to Alpha? In this state the AI is basically non-existant. It expands, but doesn't defend its planets. It never builds planetary defenses (maybe just never researched the tech in any of my games) and when it rarely build combat ships they just sit outside the planet on which they were built waiting for me to blow them up. Also, the planets it builds are a mess. I always take them without destroying any improvements, but then end up blowing up half the stuff anyway in order for the planet to be at all effective.