Good benchmarking requires a lot of work. What you did is actually useful within the narrow context you're applying it to -- quickly validating design changes.
But if, for example, you wanted to send it into SIGMETRICS for publication, they'd expect a whole bunch of extra work and background material.
One thing that's tricky in our profession is that the space of all possible configurations and inputs is gigantic and we only tend to sample the very, very small parts of it that occur to us.