I believe one of the pools is supposed to be adults-only. Sadly, it wasn't well-signed, so both pools were packed with kids when I sailed in August. However, even though it was busy, the kids were just playing nicely with no screaming or crying.
I wouldn't choose to travel on a family-focused line, but the children on Cunard are generally so civilised that I don't even notice they're there. This was the only time they caused me any inconvenience, and I kind of expected it by travelling in the school holidays.
If the kids (and their parents) had a lovely time and will continue to sail with Cunard, I can cope with that.