The easiest way to note any behavioural curiosities or to request any new features is by opening a github issue.
If you'd like to contribute changes to mobsim, you are more than welcome to fork
the repo, create a branch and open a pull request for proposing changes. If you haven't done this before,
there's a nice overview of git, as well
as best practices for submitting pull requests
in the R packages book by Hadley Wickham and Jenny Bryan.