I wasn't going to be that guy and critique the photo if you didn't want it. It could be sharper for sure and the CA is really bad on the left. The TS-E 24 II is going to be much better at the CA, and could shoot that shot at a wider aperture so you don't get the diffraction softness.
Here's how much you're picking up by shooting that at f/16 instead of say f/8 with the 17-40.
And here's a link you shouldn't look at it if you've got GAS, a comparison of the TS-E to the 17-40.
Rather than just looking at the comparison, I suggest reading the review of the 17 TS-E at the same website.