what extra controls? All that's needed is a
1x shutter button ... "record video" button NOT needed on a stills camera
1x mode dial - Av, TV, M, P, B + 3x Custom, "creative sh*t" NOT needed
1x context-sensitive and freely user-assignable thumb wheel in rear
1x context-sensitive and freely assignable front wheel
1x BBF [AF] button - freely user-programmable
1x Exposure lock / asterisk button - freely user-programmable
2 additional freely user-assignable buttons on top
+ touch screen and a smart menu system.
Easily fits on a FF mirrorless camera shell as small as a Sony RX1-R II. Where is the problem?
btw: all those "complex AF" setup options - i don't want any of it. I want to select 1 AF field on the touchscreen and I want the camera to reliable focus on whatever i have targeted and if it is a moving object, I want the camera to start tracking it intelligently and reliably. I don't care, whether camera uses "single, expanded, group or all AF point/s". All I want, is that it nails the very pinpoint in the frame that I initially seleet and in in case it detects motion there, follows subject around. Plus I want to see at all times in viewfinder or on LCD currently active AF field marked with red frame and as soon as AF lock is achieved with green frame. I do NOT want to fiddle around in custom AF menus having to decide whether i will encounter "use case 1 or use case 99", only because the camera does not have enough AI / CPU power / smarts to reliably figure it out by itself whether subject is "stationary or coming straight at camera or moving erratically around".
All Canon EOS have "One-Shot AF", "Servo-AF" and "AI-AF" options. Currently nobody uses they AI-AF mode, because no one trusts it. For good reason, because even in 2018 it does not really work reliably in practice. This is one major area where i see a lot of room for improvement for every single Canon camera. I want that AI-AF option to be implemented in a reliable, simple and trusty way. I tell camera precisely what to focus on, camera locks on it and keeps it in focus while i take care of the more important, fun and creative stuff:
*getting light right,
* getting composition right and
* getting the moment right.
Those are my tasks, and boy, I am fully occupied with these three tasks. Correct exposure, correct colors and optimal sharpness = camera shall handle it.
EOS M50 AF system is a step in the right direction with Face + Eye detection and -tracking. I want my cameras to be even "AI smarter" and getting desired object/subject in focus and keep focus locked on it, until i tell it to focus on something else.