The introduction of the A7R II makes the decision even harder for me. The advanced phase-detect AF capabilities in the A7R II allows Canon auto focus lenses to AF much faster with a smart adapter, to a point where it's actually usable. Previous Sony E-mount cameras AF very slowly with smart adapters, that's practically useless.
For the time being, I am going to keep the Canon lenses and wait for the A7R II to become more affordable to buy one. If the AF is actually good enough, the Canon lenses will become my main lenses to be used on Sony whenever AF is required.
Blue Dreams - Meyer-Optik Primoplan 58mm f1.9 & Sony A7.