[Klaus]

The problem with DSLRs - the AF can never be as accurate as on a mirrorless camera. The data just isn't read from the main sensor.
The question may be whether this matters. For most, DSLR AF has been good enough for more than a decade.
That being said - eye-/animal-AF are certainly a killer argument for some.

Regarding Pentax - even if we assume that they improved the camera - their in-lens motors are just dated.
Their "updated' Limited primes still use drive screws and SDM was never top-notch.

However, once again - it's a question of whether these are no-goes.

The K-3 III looks awesome and I'm sure that the handling is better than on some of the mirrorless options.