As far as I can tell it's not reliable and there isn't a reason for this dom to go wild over it. They are analyzing third party data which was reported based on what Edison was supposedly given by election officials. None of their numbers are guaranteed to be accurate and all of the "vote switching" could have just been Edison changing around numbers rather than the election officials.
There is certainly not going to be any lawsuit or consequential action directly from that data. If the underlying thesis of vote switching is correct, the analysis will have to be run on the actual reported votes from the districts.
This is not exit polling data. They also report the official poll data which is what this data set purportedly is. Here is info from NBC which says they get their election data from Edison/NEP.
That said. Nothing about Edison is official. Any mistakes they make in their reporting are not "official" and all analysis of the data set is subject to their garbage/glitches in addition to the state vote data.
More info on their process: https://threadreaderapp.com/thread/1325578702135160833.html
did it start? it just dropped me from hold.