You are funny, learn how to use AF first.. this is my old classic K5 with Sigma 70-200/2.8 HSMII AF-C
K5 + Sig70-200, 200mm F3.5
And considering AF in general - for example I did several weddings with colleagues. They mostly used 6D and D610. In average they create more than 900 photos per wedding and 300 can be removed instantly as they are completely misfocused + some with bad exposure also. The rest still contain at least 150-200 shots, that are not focused to the level considered to be a keeper for me. That is almost 50% wasted shots.
My results with K5 usually were 450-500 shots per day and about 25-30 pieces were wasted by AF. Rest are usually keepers.
That is the reality... with old K5 with sucking old AF using mostly 3rd party lenses - Sig8-16, Sig17-50/2.8 and Sig70-200/2.8II, sometimes FA35/2, FA50/1.4 and DA18-135.
If new K-2? APS-C body is improved over K3/K1 in AF capability, it will be good camera. Of course there is a lot of space for improvement in AF area, but even 6 years old camera can provide reliable results if user is not a potato...