I also kept thinking watching the match and all of our recent matches.....Juve always seems to have like 10-15 corners in a match but we NEVER look like scoring from any of them. I think we also miss Chiellini's presence in the box at corners. The thing is Vucinic is not the type of striker that scores from corners - actually the most likely scorer from corners is Bonucci....but he never gets his free headers on target (thats not directly related to this match). But Lazio has 1 corner = 1 goal.
I fear that defensively, we look more vulnerable right now. In January we have committed errors in defence we have not usually committed. I actually think in a way, that has cost us more points than the lack of finishing.