Me too. That was the only one where I had trouble finding the weak spot.
I've completed all the games now. Now I wait for the next game. It's likely that it'll be an Apollo Justice one. The first Apollo Justice did sell well, after all, but it's been about 3 years now. For the Phoenix Wright games there was only a 1-2 gap. And I'm talking about when they were originally released on the GBA.
There's also a chance of another Phoenix Wright game, since at the end of Apollo Justice, the courts find out that Phoenix Wright didn't organise the creation of the forged evidence he submitted to get him de-barred, and, additionally, he says 'I might take the bar exam again.' I'd be surprised if he didn't. That bit where you play as him during the last chapter was pretty cool. He was like a pro.
Then again, they might put a new defense attorney in the leading role, since the 3DS era isn't too far away. If that happens, I hope he or she has blue hair.