Am I alone in thinking that the MC never seems like he's ogling a girl? In the car, it just looks like he's looking at Anne, probably because Ryuji is making such a show of it. More of a "what's going on?" than a "that's hot."
It seems similar to the case where Yu joined in with Yosuke eating Chie and Yukiko's food as far as joining in on the antics with him looking at Anne. Anne also calls them idiots, so she certainly didn't see it as just being Ryuji.
I think the are trying to strike a balance of balance of how much emotion the protagonist can show though which is why they may have even dialed back his expressions in his cut-ins since they were shown.
They all look shocked at the same time. Otherwise, the expressions are:You're definitely not alone. The beach scene from the fourth trailer gave me the same idea. Yusuke and the protagonist look both kinda shocked, Anne is cool with everything and Ryuji is getting aroused.