I had the somewhat recent pleasure of being on F on a LH flight with the cabin to myself. Thanks for bringing back some good memories. IMO, the service lapses are undoubtedly caused by a full house as you said you thought to be the case. The LH flights I have been on with a few people have been generally flawless. On those with many people, you need to tolerate a bump or two with the service and quality, but I still have been very happy with LH overall. Now if they can replace the seats.....