We love the owner's version L440. Whilst we don't often sit on the sofa in the owner's cabin, we do occasionally and it otherwise serves as a good spot to temporarily place clothes or other items...and (importantly for the Admiral) it looks nice! The desk in the cabin is often used, allowing us to have a desk each basically. Most importantly and as others have suggested, the bathroom arrangements (including the closed shower cell with a seat; the large(ish) sink+vanity; and the walk-through wardroom inside the closed bathroom door) are excellent, amoung the best for a vessel that size.
Steady Hand's comments about preferring more hanging space are fair enuf and that might be a legitimate criticism of the L440 owner's version layout. That said, there is at least some reasonable hanging space in the walk through wardrobe...and we also use the guest cabin wardrobes for overflow, including our wet weather gear
and so on.
There is certainly a case for the extra berth if you're likely to have lotsa guests, but we rarely sail with guests. Guests on board for a day outing is another matter, but we don't need berths for that and, as the OP will know, the L440 handles lotsa guests easily. Even when we do sail with guests it's another couple (or perhaps a family) such that the two cabins (and two heads) in the 'guest wing' cope nicely.
Good luck with your purchase!