Give Dayton credit, they're being as proactive as possible. They'll lose Archie Miller eventually, but they've shown a willingness to counter interest from other schools, which should at least postpone the departure date a while. Miller and Dayton have agreed to a contract extension through the 2023 season; it's the third year in a row they've come to terms on an extension.
This is also the third straight year Dayton's been to the NCAAs. In 2014 and 2015, the Flyers were an 11-seed, but they improved to a 7-seed this season. Incidentally, this year's team was the worst of that bunch, and they also happened to get dismantled in the first round.