I expected more creativity out of Nick grappling. He's done some wonderful standing kimuras that turn into scrambles (see the Sherk fight) but wasn't even remotely close in this fight.
I did lol IRL when he went for a gogo in the 4th IIRC(???). Should have pulled guard and tried it when he rocked GSP in the 3rd. Alas, Diaz got worked both standing and on the ground.
I do think GSP has declined defensively on the feet in recent bouts. He's been wobbly in his past two fights (dropped via LHK from Condit).