1) what do you mean? There's an auto-setting for the miners to go find new resource sources and start developing them, and mines automatically ship resources to the nearest friendly planet. What exactly are you looking for here?
2) Yup. Coming Real Soon Now.
3) You're talking about Hypergates. Yeah, there's been some talk, but no commitment from StarDock so far. It's come up a number of times, but the level of enthusiasm seems muted. I'd like it, but we'll see.
4) You mean ranged attacks for starbases? That they auto-attack anything within X hexes? Maybe. I'm not convinced this is a good idea, especially automatic ones, because even if I want my starbase to have a "zone of control", I certainly don't want it attacking everything around. And I think auto-attacks are a good way for a starbase to die.
There's been a lively discussion about a Turn-Based Tactical setup to replace/supplement the current combat system. It almost certainly won't appear in the first release - because, frankly, while there's a bunch of people who want it, the majority seem to be of the opinion that it's not essential to the game, and it should come after all the other features are set. I'd expect to see StarDock gauge the wind after the first release, and consider then if it should be part of an Expansion pack (I can't see it as DLC, since it's far too complex for something like that).
There never will be a flight-sim or RTS combat game in GC3. This is a 4X game, and such a "feature" would ruin it for many people, not the least because it requires a whole lot of micromanaging, and a major time commitment increase for a game that already can run to 100+ hours.