For some reason I really enjoyed Tron Legacy. I even want to watch it again. I even liked Oblivion a lot, even though they kinda come across as really humorless and bit boring. And I think the script for Legacy was a mess, and that was perhaps the worse movie. He can certainly craft cool action scenes.
Kosinki would make an amazing second unit director for someone, allow him to do all the action scenes and help with production design, but the man in charge for crafting a good movie, for knowing if the script is ready, for knowing when to pull the trigger, I am not sure he is that person.
I'd like to see another attempt at Tron although, I am very surprised they are doing it. I don't know if its got as much mileage left as they seem to think it does.