I don't think everything has to be melodrama. Previously in his career Edu's been good at making moves at the right moment for himself, and that looks like what he's doing now.
Edu's probably correctly reasoned his next two or three seasons at Arsenal were more likely to tarnish his record or leave it unimproved. He'd have had to make a lot of big sales and potentially contend with a shortfall of major trophies. This way he'll slide into a more senior role getting more money and arguably under less pressure.
