Yes colours are more and more often requested, we will see what we can do about this. This is definitely an important feature.
Lots of improvements in the sketching algorithm are on their way. Few weeks to go
Including this one.
Yes, sometimes the so called "look-at-point" of the camera can behave silly, we will address this issue.
I suppose the problem here is that the "reset camera" functionality is stupid, and it should be smarter, and consider the contents of your workspace when resetting the camera.
Thanks for reporting it - we will do more extensive testing on this, and write more automated test for this. If you find a way to reproduce this issue, that would be really helpful.
Nice job btw. 