Hi simbass, thanks for commenting, and especially for pointing out the bugs! We'll work on fixing them for the next build.
Queuing actions with shift is definitely something we want (and really need) to add. However, it requires a lot of code to be refactored, with the potential to cause a pandora's box of new bugs to test for, so we're careful about when we do this and can't provide an ETA. The only thing we can say is that it's 1 of the 3 most wanted features that we want to work on soon.
Improved AI is probably the largest task we have ahead of us. There are very few RTS games (even AAA) with decent AI, and we're a small team, so it's going to be a big challenge. We are definitely going to tackle this challenge at some points, but we can't promise an ETA.