Besides the Phasma scene, I'd say that a lot of scenes with Rey and Finn on the Falcon (them fixing the Falcon, the "I bypassed the compressor" scene, the "YOU KNOW LUKE SKYWALKER? :O" scene) and the Rathars.
I get that they were trying to show some energy and enthusiasm in comparison with the "sterile" acting of the prequels, but they went a little far.
Both Daisy and John reeled it in for the last act, though, which I appreciated. I still think they're great finds - I just wish they had toned it down a little.
I reckon it works fine because the characters - especially Rey - are presented as in-universe Star Wars fanboys. It makes sense for her to be overly excited about those things.
I loved the characters in Force Awakens. If they had managed to get me to care about the characters in Rogue One even half as much then R1 could've really pushed for being my favourite Star Wars movie.