As for the V&A building itself? I'm sorry. I didn't get it. Appeared to have huge amount of wasted space, then huge spaces devoted to a café, shop and restaurant, and that doesn't leave much exhibit space, which is the point of the whole building... in that respect it reminded me of the Riverside Museum, Glasgow, which also doesn't appear to fulfil its main objective of being a good building to display things in. This means that the small Scottish Design area is overcrowded, with long queues when I was there.
In short I'd highly recommend the current exhibition, and if a future exhibition interests you then do go, but otherwise I'd maybe postpone your visit until it quietens down a bit (and they turn the restaurant into more exhibit space...).