An interesting opinion from someone else…
It was no surprise that in the years after his mother’s death, Harry’s behaviour was seen by many to be erratic and that he suffered from anxiety and depression. His misfortune was to have married a woman who, instead of rescuing him from his demons as Kate appears to have done with William, dragged him into her own destructive vortex of anger and narcissism…
Harry and Meghan tried to break the monarchy and failed. The King is popular; the Waleses more so. Harry may be a damaged and painful limb of the royal organism but banishing him at the moment his father is crowned would feel as if the monarchy had been amputated…
Whether not Meghan accompanies her husband is a detail. The person who matters here is Harry.
So the King should indeed go to considerable lengths to get his younger son to the Abbey. True, it sticks in the craw that Harry is said to be laying down conditions for his attendance or is being offered other inducements. Some of these, such as where he might sit, seem childish. Others, such as the suggestion that he should be allowed to retain his titles if he attends, have far more serious implications.
So, red lines need to be drawn. The King needs to be careful not to be seen as weakly surrendering to threats. Precisely where those red lines are drawn calls for resolution as well as skill and sensitivity. One hopes his advisers are up to the task.
As for poor Prince William, his own raw feelings must similarly be parked for the occasion. As the royals are trained to do, he must simply suck it up.
Or rather 
