Anthony,
M and K lenses meter with the Green Button in M mode. I actually find that its a matter of getting used to. Too bad its not going to be faster than Av mode
At times, it can be an advantage though. In situations where bkgnd color or exposure varies, but actual subject exposure remains largely the same, its quite good not to have to deal with over/under exposure do to the camera being fooled.
(Eg. Night Markets; Indoor events. The bkgnd may be dark or bright depending on where the subject is, but the subject themselves are usually under some sort of illumination where their exposure is actually quite stable)
Eg.
In these 2 shots, I don't really care to exposure for the bkgnd. They would not have mattered much. So exposure actually stays quite stable over the whole walk in Little India.
The thing is to be very aware of the lighting changes around you and meter ahead of the shot. Take a meter from the hand or just meter the surrounding. Then take a trial shot and fudge the exposure from there.
Of course 'A' lenses are much better. In fact, I would suggest you get them over K and M series lenses, as I understand your difficulties in coping to the system change. Generally, the 'A' series should have all the lenses that you require.
I no longer use a split screen. It was a pain getting the split screen to align when it was in tack focus.
Now, I just use the magnifying eyecap and make sure the diopter is 'calibrated', so that what is sharp is sharp.
When I shoot, I just make sure the area I want to focus on looks sharp and I take the photo.
Eg. When the eyelash of a human subject can be seen on my viewfinder, I know its going to be focused there, since my diopter is 'calibrated'
The focusing screens need proper shimming to get it to be precisely tuned. I just did not have the patience to go through doing it.