With all this stuff you have to start with the realization that 75% of the photos ever taken can be captured with almost any camera ever made. What makes technological improvements important are the 25%. It was possible to get stunning wildlife shots with film, but it took a container full of film, a couple helpers loading bodies, and a staffed lab somewhere to process them all. A huge pile of money helped. That is what National Geographic did, and did well. Now with a $1k or less body and that much again on a lens you can get stunning shots.
That canon with the low DR and small number of points are good for 95% of the photos taken.
So this is what I face to get a decent wildlife shot. This is an uncropped unprocessed shot of an osprey nest yesterday morning. I am unusually close to the nest, very seldom am I able to get that close, and the male will land on a post half the distance away. If I told you where it is I would have to shoot you. 500mm sigma 4.5 lens on a k3

On the K3 the focus point is about the size of the head of the bird. I am able to get good reliable focus. The K5 would span the shoulders and part of the other bird, and there were lots of throwaways as a result. The canon would have the same problem.
At twice the distance, the point is too big. I would like a point half the size, I miss shots on things further away. But, and a large but, a smaller focus point means that the slightest movement changes focus, either me handheld trying to keep the thing steady, or the subject moving. So it is necessary to add points and logic to help the photographer get good shots. In my shooting yesterday morning with these birds flying around I had maybe 25% keeper rate. There will never be 100%, but every marginal improvement in hardware capabilities gives me more keepers. I shot manual focus 400mm for a year and got birds in flight. About 1 in 600 shots. The K5 with 150-500 sigma was quite a bit better, but maybe 10% or slightly less were ok.
For a smaller point to give me more keepers requires that there be points surrounding it. Right now on the K3 a flying osprey can disappear between points, which I think causes loss of focus. So smaller points, tightly spaced gives enough to the logic to keep focus. Yes we are talking tracking, but with small focus points tracking is a necessity in a busy dynamic scene.
In all these discussions it is easy think that what we have works. What I have found is that I limit my shots to scenes and situations where I know I can get results. If you have a lens that flares, do you take shots into the sun? No way, it is a waste. But if you have a nice 15mm limited, that is all you end up doing because the results are amazing. Same with focus. A fast moving subject in a busy scene usually means I don't lift the camera because I won't get a shot anyways. If my body and lens were quick enough, had a very large number of points and a fast processing engine to implement very good logic, I would take those shots.
The K3 is pretty good with focus, it has rudimentary tracking ability. Some improvements with faster lenses and some optimizations of the logic are possible, and I think the K3II will maximize it's capability. To improve requires more points more logic capability, more speed. That will be in the next major update of the aps-c.