Argh, original post got eaten.
I would love to see an improvement to starbase upgrade management. In the middle game, with a large empire, it was really tedious to manage 5-10 new constructors every turn. It'd be great if there was an "auto-upgrade-nearest-upgradeable-starbase" button.
Yes, fleet rally points are great, but managing one per starbase isn't an efficiency gain.
Also, I was never sure if multiple bases around a planet stacked their bonuses. It seems a little OP that they would, but it also makes sense that each additional starbase would add incremental benefit...