I'm afraid I can't really add much more to what Sue said, because Scotland was the first thing that came into my head as well.
I think part of the reason why South Africa rejected the idea of delegating the management of business to a smaller committee was a reflection of some of the internal divisions within the country and the perhaps under-representation of certain parts of the country in that smaller committee. It is not a direct parallel, but I think those sorts of issues are going on in a number of different parliaments. Unfortunately, off the top of my head, I couldn't give you another specific example, I'm afraid.