Thanks for playing and providing feedback!
1. This is something we want to do, but it's a big technical challenge so we haven't started on it yet.
2. This is a known bug and will be fixed in the next version.
3. We're working on making the trucks smarter, but don't really want to add any micro-managing on the player's side. Trucks will also be able to collect from waste dumps in the next version.
4. We used to have this for roads and pylons, but took it out for some reason. We have too many buildings to give each one a key though. Not sure what the solution should be.
5. I'll think some more about this. Might be worth doing if I can find an easy way to implement it. Might also make less sense once buildings take some time to construct and deconstruct.