FFX might be worth two playthroughs. However, my two playthroughs of FFX happened a few years ago already. I just want to replay it to see if I experience it the same way now, ten years after I first played it. I suspect I won't, but we'll see. And maybe get some trophies, if they are actually appealing and not just really boring.

But no, really. If you're spending 40 hours practicing now and 20 hours getting the trophies when it launches, you haven't gotten the trophy "faster" than if you spent 60 hours when the game launched instead.