We know Dubas envisions more that 5 minutes a night, but yes, we won't know until games are played and how he fits.I suppose that's fair to point out. (hypothetical because we havn't seen him play on the Leafs yet) We are talking about a person who might see 5 minutes of ice time. His value is in what he represents just sitting on the bench.
So this is all negligible. You would have Moore fetch some other piece instead of re acquiring the one we let go.
Maybe a prospect? Or a pick our way? Or any number of things more valuable then the very slight difference in the 5 minutes of ice time Clifford will perform versus Matt Martin.
It's always a gamble, you just have to do your due diligence then throw the dice.