I think it was a very reasonable take at the time. All indications were that he only wanted to play for us, and two 2nds seemed very steep for a guy that we were probably 90%+ to have in a year anyway; also saving a year on his ELC.
Obviously if we had the benefit of hindsight, and knew how good he was going to be, nobody would have made a peep.
I know no one knew he would be this good but there's no reason to play with fire. Imagine if we didn't make a trade and he signed elsewhere. Most players don't play for their childhood favorite team I don't think it's a given he would have signed with us.