Personally I don't think it's that crazy. Tricky has a more complete halves game, especially with the boot. If he could show that he can consistently dig deep into the line and create space for his outside men I'd like Moyza does so well I'd see little reason not to pick him. But I think this is the main attribute that Moylan does so well every single time he needs to. It has considerably contributed to our success, despite not showing up on the sheet as an assist.
Given that the coach watches them run around for many more hours a week than us, I trust there's good reason why Moylan is still the pick. But I do think if Trick was off contract, we'd be in a play him or he leaves situation. I think he's much closer to being equal or greater to Moylans offering than some suggest.
In saying all that though, I agree with your summation of games that Tricky being in would have changed. In addition though, I don't think we'd really have lost any of the games without Moylan, other than maybe the Parra one? (I can't remember if that's the game he smashed). I think Moylan wins out on experience, purely because we are a shot at winning the lot. If we were an 8th place team it would be easier to lean towards just getting more games under Tricky's belt.