What do you think about canceling the candidates?
I think it's safe for players. Especially now later ding will may be come back from his loses too.
There is no perfect solution. If the Tournament is restarted to let in Radjabov, it is not fair to the tournament leaders now, its just a mess. The best compromise is to seed Radjabov directly into next candidates, I am sure he will be motivated to stay in shape and if he is not he will choose not to play, he is a proud guy after all.
At this point I see no better way out of this, it is what it is.