She does look smaller than I remember, and from photos of the old queen. Also, I looked at her with a magnifier and while I don't see any injury, her abdomen end looks open, if that means anything (can't see any sign of a stinger - tho I know that Queens don't lose theirs when they sting...).
So, should I be worried about swarming with those cells? Should I do a split preventatively? There seem to be loads of bees in the hive, and the super, which had brood earlier, is now getting filled with honey (also probably some syrup that I fed earlier). They also have a second (lower) deep that was empty a week ago, and which I put some foundationless frames in to keep them busy.