It seems I'm not alone in the feeling that mirrorless is still not where it should be. It's odd as many of the things on the lists are already solved for DSLR's.
And some not ..
To paraphrase Ming : " So let’s do something positive, once and for all. Here is a short list of essential things that every DSLR camera should have, and not necessarily to the exclusion of other functions."
1- PDAF/CDAF
2- Focus peaking and exposure zebras are a must.
3- Adaptable lenses (inc AF where applicable) with Sony/Minolta, Leica (M,R) and CaNikon glass.
4- Auto switch from AF to to magnify live view with peaking (MF) by simply rotating the lens' focus ring
5- Sensor-based IS like the M4/3 or A7II series cameras effective on all lenses (common sense required here)
6- Alternative to touch screens: add remote camera control via smartphone with NFC (including selecting focus points by touch).
7- Customizable menus and shortcuts (read: assignable buttons and QM)
8- The option to charge or run over USB power like the A7II series.
And a shorter 'to-do' list for both MILC and DSLR's:
1- An ETTR metering option, based on RAW, that exposes until a certain percentage area of the frame clips (settable by the user).
2- Selectable mechanical and electronic shutter options - leaf shutters are great (and combined with an electronic shutter to hit higher speeds). Electronic first curtain should be standard.
3- Ability to write files to a USB attached SSD as well as the internal memory card either at capture or later.
Edit:
And all MILC lens manufacturers should make a Leica style coupling ring that allows you to mount two lenses back to back ...
![](http://www.leicastories.com/img/leica_stories/in-the-bag-cameras/ls-gear-coupling.jpg)