Very interesting, thanks for putting this together.
One thing that I'd like to see - on compensation, can you clarify whether the stock grants are valued at time of grant or at time of vesting?
If they are valued at time of vesting then the numbers will be much harder to (a) compare against one another, and (b) extrapolate into the future.
Right now the submission form is ambiguous, which I worry is muddying your dataset. I highly recommend picking one and clarifying that on the submission form.