I blame BRIAN ENO, who was the producer for both Viva la Vida and Mylo Xyloto, and if you notice the difference before and after you will see how much he's changed them.
Mind you, I hate Parachutes as much, it's slow and boring, the falsetto is unnecessary and the songs are mostly contemptible love ballads (but on the other hand I am just an angry old man).
My review of Mylo Xyloto can be found
here or
here if you like pictures with captions.