I'm pretty sure they don't even write their own music anymore. It's just extremely boring stuff. Coldplay used to write stories, but now they just produce pop fluff.
First 4 albums were perfect.
5 and 6 were decent, but had some headscratchers.
7 was meh.
8 was surprisingly interesting, in a good way. Not a fan of them venturing into the explicit realm though.
Other than Coloratura, 9 and 10 have been terrible.