[Matt R.]

I agree. I think a raise to 100-150 or so would have set up the turn push much more nicely (and gotten that gutshot straight draw to fold). One thing that may be worthy of consideration is keeping the pot size as small as possible while still conveying strength on the flop. Maybe this was the intention in that it reduces everyone else's pot odds to call on the turn all-in, increasing the likelihood of a fold?