All vans are a compromise, but I like how the GC600 balances those compromises. You still get plenty of garage, a decent wetroom, and two beds in the NZ model, all while staying within the space constraints of a van body. As someone who traded in a large six-berth motorhome, I'm glad to now have something with considerably more structural integrity. You should try driving something that's the front bit of a van with a large plywood shed tacked onto the back (i.e. most motorhomes) down our rough roads down under. The flimsy nature of the price point competition is one of the biggest reasons that the Grand California is a sales success in New Zealand.
The GC hits the spot for us, it's relatively affordable, has 4wd, high safety levels, and we don't mind the 'Wimpy booth' when it frees up space for far more important things. As for the TV or lack thereof, we don't miss one in any way, although we do get the laptop out to watch something occasionally.
Meanwhile, anyone who wonders why the bigger 680 can't have a second bed needs to look at the payload issue. The 680 can only cart nearly half as much weight as the 600 can, and fitting the second bed would have compromised that further.