Davidson is taking too much criticism over this one. Hall wasn't bringing back an early 3rd by himself. He wasn't bringing back a useful player either. The money for Rantanen is irrelevant since it is coming off the books at the end of the season.
We as fans can talk about what player may or may not be on the board at a given draft slot but the reality is that we aren't on the floor or a part of those conversations. I am of the belief that you can never have too much draft capital. It opens up trade avenues. Options are good.