Without knowing how much you've used the phone, I'd say that's probably lower than where I'd be with the 13PM. Considering you were asleep for a big chunk of that time (I assume) that means you've used 46% in around 5 hours of awake time? I charged my 14PM to 94% last night at 11pm. I'm currently on 58% with about 3.5 hours of screen active time.
To give you an idea, on the 13PM, I'd go from around 85% at 8/9am to about 25-30% by about 10pm in the evening. And that was with mid-to-heavy use.
Edit: again, as others have said, it's worth giving the phone a few days to stabilise etc. before judging the battery.