Yeah... We were there a year ago and it was unimpressive. We too experienced kids running around as well with no parent(s) in chase.
We're heading back to BCN in Sept and we've already decided that this time we'll explore the airport shopping scene this time. Last time we were ending a three week cruise and already had too much "stuff" in tote so no shopping was even on our minds. Just wanted a quiet spot to relax before trekking over to London then SFO.