a99 II - 42MP @12fps - $3199
5D m4 - 30MP @7fps - $3499
1Dx m2 - 20MP @14fps - $5999
D5 - 20.8MP @ 13fps - $6496
That set of figures proves nothing beyond it being an academic and sterile comparison of numbers. It doesn't even pretend to bring the lens range into the calculation.
Within the same company there are different camera models/priorities designed to suit different users; you can't make a general assumption of value based just on a numbers game: when perceived value changes from user to user, it's an exercise in futility. "All things to all men" has never worked.
For myself, I have never used the burst shooting method, other than once with a film Nikon, because it's just not my way, and for me, quite pointless: I want to see what I am actually likely to be getting, and a tripod and careful framing does it for me every time. However, I actually hate carting a tripod now that I'm retired, and wouldn't do much of anything anymore if there was no alternative to that. But, losing one helpful factor doesn't mean I want to go blind and rely on the camera making the moment for me rather than my own mind still doing that part of it.
Of course, one could instantly retort that doing fast action is helped a great deal by those high rates; that simply proves what I wrote earlier: you can't hope for any machine to cater to all tastes, so comparison based on numbers mean little.