A passenger view
How about looking at it another way...ie from the point of view the the FC passenger..yes, the guy that pays your wages! All airlines spend millions building up the image of their brand, and the pinnacle of that effort is the First Class cabin. Guess what people buy when they go for FC (as opposed to Business)..nope, it is not just a comfy seat and a better brand of champagne.. It is two things: exclusivity and privacy. So, these people pay thousands of dollars for that and then, ah ha, they suddenly find themselves in the company of the hired help.
I'm sorry, but if I pay to dine in a swanky restaurant I don't expect to end up eating with the chef or the head waiter.
Yes, yes, yes, you guys are important and need to be well rested etc etc, but at the end of the day you are 'working' and the passenger is the customer.
Get over it, and if you want horizontal rest go to the rest area.