I can't really go into the problems with SPR 2nd half without dropping huge spoilers for Ric.
I'll try hinting. They involve Hanks and another character's reappearance which results in a reversal of attitudes for a third character? Also in a less spoiler-ish fashion, the heroic sniper sent from God was a bit daft.
I'm not saying it's a bad film overall, just that if Ric has seen the first act then it's all down hill. Only seeing the first half is probably the way to see that movie ;-)