I have 6D and i had 5D Mark II, so i used both the joystick from the latter and the "inner-wheel-joystick" on the 6D; and i just used 3 days ago a 5D Mark III for a couple of hours doing backstage shot in a studio where i was assisting a photographer, and well, you'll kill me but i can say FOR ME (personal preference) the one in the 6D is WAY more comfortable than the one on 5D serie, i find that one too sensibile and completely unusable.
But i have to say i never used a camera with more than 9 AF point before the Mark III, and i use it for not so long, so i honetly don't know if you handle AF points selection better with the joystick than the "wheel-joystick"...but we'll se, ad i think i'll be an eraly purchaser of the 6D Mark II.
I also wanted double card slot and sh*t, but i had to be realist, if i want that i should go for a 5D, Canon would not insert the double slot on the next 6D due to price and to market strategy to have different layers of cameras. Fot the FHD vs 4K no problem, i don't have 4k monitor, nor a 4k tv, nor a computer able to handle such resolution and file sizes, so i'm totally fine with a nice FHD if they worked on that removing banding, rolling shutter, etc.
But, just tell me, am i the only one here who does NOT absolutely like the idea of the articulated screen? I find it useless for what i do, it's something that could be damaged because there's extra mechanics and extra electric stuff compared to a fixed screen...i'll buy the Mark II anyway, but honestly is very disappointing for me (again, i'm talking for myself), i found that absolutely unattractive, i have a backup 60D since 3 year and i don't remember a single time i used the screen outside its slot.
Anyway, that just confirm that for Canon this camera is aimed mostly at prosumers, but i'm totally fine, as it's the photographer that gives professionality or not, and not the marketing strategy of the manufacturers. An amateur with a 1Dx Mk II will always remain an amateur, while a professional with a 1300D and a 18-55 kit lens will always get professional results with controlled conditions.
So don't whine on what you shuld have wanted or not

just buy the camera that better fits your needs and that you can afford, no matter you call yourself amateur or professional...i read lot of people talking about Sony...well, god bless, buy Sony, why do you need to fight on a forum just to defend one brand or another? I wanted a 5D Mark IV, or better a 1Dx Mk II, but i know my pictures won't be improved, and also i can't afford them anyway. I'll buy my new 6D Mark II and i'll live peacefully
