The auto gearbox in the new Grand Picasso is utterly terrible.
I have: 1*3 year old, 1*6 year old and 1*8 year old, and we all manage fine in the RS 250. Although now that #4 in en route I'll have to have a rethink.
Never seen the issue with needing a "big" car with lots of kids, unless you're the sort of parent that needs to pack enough kit for a trip up Everest every time you go to Asda.
Its all about convenience, you can do the crypton factor and fit it all in a normal car, or you can just throw it in a small people carrier, and have a better view of the road/eye contact with the McDonalds drive through staff as well!