michamen said
50% of the time a family of 4-2 adults, 2 children will of been allocated 2 lots of 2 seats
I certainly wouldn't consider that a problem as some people obviously do, from what you say. Likewise if we get a 3 together but an odd one somewhere else, that's fine too. And if on paper we get assigned the two children together somewhere and us together somewhere else then of course we just switch among ourselves.
In the original situation of real concern (i.e. both children separate from each other and their parents) it's not just the inconvenience to us as much as the knock-on inconvenience to other passengers and the crew whatever we do (i.e. shifting people around causes disruption but not shifting and leaving lone children with strangers doesn't go down well with the strangers).