I've been lurking for a while on this excellent site, so thought it was about time to contribute.
I used the Mel FC Lounge last week and it is obviously a distinct improvement over the old one. At least there are some windows! Not sure about the restaurant idea yet - I'm so used to grabbing some food and drink and going back to my spot and working, that the idea of sitting down at a table and dining will take some getting used to.
Lots of nooks and crannies to explore, which is great, though it was pretty full when I was there in the morning. It cleared when the LAX flight left, because the AKL-LAX flight is two class so there were only WP's in the lounge then.
Compared to the Singapore FL? More facilities, library, etc, and the view is great. The bathroom facilities are pretty flash with large self contained cubicles, though they had not replaced the towels for the main bathroom area, so there was nowhere to dry your hands. An attendant had just serviced the cubicles but forgot to do the main area. Guess they will work that out over time. Its not as spacious as Singapore, but has a higher staff ratio, and they were suitably attentive.
Overall - great effort, and next time I'll try the food! Must make it an afternoon/evening flight so I can also try out the offering at the bar.
I hadn't noticed the new First Class check-in area so I lined up for the business class one and grumbled to myself about the queue. The check in girl directed me over to the new FC area and that was pretty cool. Only opened for a week at that stage but the staff were really keen and helpful. I consider that to be a real benefit for FC or WP. Hope it doesn't get too busy during the peaks.