However your not tipping your hat to the huge values Jenkins provides:

    * Reporting such as unit test reporting
    * Emailing and notification
    * A well known plugin system
    * User security
    * Master / Slave management

Jenkins is not just a job runner. Its a job runner that collects reports, maintains history of the job being run, manages user security, has a public api (REST) and plugin system. That is a lot of stuff to implement on your own.

Really Jenkins just needs to fix the configuration drift issue.