I've been following it. When first announced, only a handful of paleontologists had worked there. Now that more are being brought in, in addition to other fields of geology, this site is going to yield untold discoveries of that fateful spring day. Yes, there is evidence it was a spring day. Sedimentologists may find out how tall the seiche waves were. Geochemists might be able to understand the composition of the impactor itself from tektites. Modern survey methods might be able to understand the hour by hour, day by day drama. It is really exciting, one of the greatest geologic discoveries in history. I'd pay good money to spend one day there.

The Wikipedia page has a nice overview of the findings: https://en.wikipedia.org/wiki/Tanis_(fossil_site)

The exploration is really just getting started. Fitting that it is in the Hell Creek Formation.