I've been musing on this again, as I do.
Suspension has been mentioned - self levelling would be great as has been said, because at the moment one suspension setting has to cope with 'empty' to 'three fat lads' to 'a pallet full of stuff' so it's inevitably compromised.
Because of the short wheelbase is can also be a bit choppy, and the height means it leans a bit.
And then I thought - why not fit the clever suspension from a Citroen to it? It seems mental that for years Citroen plugged away with their amazing suspension, and now, when all the cars they seem to sell are Picassas, which would benefit hugely from it, they only put it on their top of the range cars.
Anyway - lovely active suspension that had 'comfort' (i.e pot hole ridden city), normal and hard settings would be amazing. It would prevent roll and mean it was always level too.
So, my semi-serious list:
The new 2.0 JTD (seems to be more powerful and more efficient than the 1.9 - about 175bhp / 300lb-ft would be just lovely)
Six speed gearbox
Option of q2 limited slip diff (for getting off muddy campsites rather than perfomance, although it would help with both)
Optional AWD (presume the system from the Sedici would fit with longer shafts?)
All seats including drivers fold flat so you can put an airbed on top
All seats except drivers seat removable
Panoramic glass roof
Sat Nav screen that folds out of the top of the drivers side glovebox / cubby hole thing.
Active suspension from a Citroen or similar