I wasn't that crazy overall with his performance.
He played a decent enough Vulcan but yeah, his performance (and look) fell way short of Nimoy, both superficially and in essence.
If they had waited a few years they could have had Benedict Cumberbatch : (
In fairness, he has been written less Spock-like too. The guy looks the part and sounds OK too. It's what he says and does that is a little off, and that's writing.