There was a moment were Han said something about there always being a weak point e.g. a shield thing in the woods. It was set up perfectly for a joke poking fun at the past episodes but nothing 
The one thing I’ve not really sussed yet is whether Finn is another force user. The lightsaber thing might have been a bit coincidental or an outright bait and switch, but he seems to be good at stuff. Also, he and Rey have that discussion on the Falcon about their surprise in their respective abilities.
I known it was the same actor, but did anyone else think C3-PO’s voice sounded slightly different this time?