The development version is, as the name implies, still under development, although the number of users here reporting problems whenever they arise does help to make it fairly stable most of the time.
As to the signals, I am slowly putting together a series of video tutorials on how to use the various different working methods: see here
for more information on that. Please let me know how helpful that you find the videos.
As to passengers ignoring you, can you give a little more detail about this issue?
Thank you very much for your feedback so far: it is much appreciated.