We are currently alpha testing the new engine with the council in a test world. The rushing and passing logic are roughly in place and playing through games. I am currently working on tightening up the results so they more closely resemble results you would expect from the college teams. I expect the results will need more tweaking as we go along and probably will continue to be adjusted throughout beta.
A large part of the remaining work is re-adding penalties and turnovers to the plays, as I can't use the old penalty and turnover logic since the base play simulation code was pretty much gutted. The good news is I hope to get penalties and turnovers to be more closely related to ratings and what's happening during a play. I will definitely work on getting turnovers in before beta, but for the sake of getting beta rolled out sooner, I might hold off on penalties and add them in during the beta.
We are also working on getting all of the new game setting pages working so they can be tested in the alpha testing and we'll have at least one more season of alpha testing before beta can be considered. I want all of the pages to be fully functional and complete (minus any changes that come out of beta) before we launch beta testing.
I would expect at least two more seasons of internal alpha testing before we consider beta testing.