Originally posted by andy888 PTTL does have its method to solve the needs.
Yep, it lets the photographer walk to flashes, temporarily unwrap softboxes to get to them, etc., in order to get support for individual flash compensation (or achieve a global compensation that exceeds the small -2EV -- +1EV range the camera provides).
Well done, P-TTL, you just gave the photographer some healthy exercise and lots of time to ponder about how to do the next image.
Single light, standard key light applications? P-TTL will be fine (without the consistency and predictability of manual control, of course).
Multi-light, creative lighting? P-TTL is too outdated. It is a known problem amongst Pentaxians.