I like the 14mm II and TS-E 17 better than the 16-35 II, but the 16-35 II is hard to beat for travel like this. The 14 II is prone to CAs and does not take filters, but it has better IQ than the 16-35 II, is wider and is more compact. Unless you plan on using the 16-35 II at 16mm exclusively, I wouldn't consider the 14mm prime. And the 14mm feels a lot wider in usage than the 2mm difference from the 16-35 II may indicate.
If I had the choice and had sufficient time, then I'd consider the TS-E 17 over the 16-35 II. The shift will help for architecture/landscape shots, and it can help get you some nice panoramas. But it is MF only. In this case, the 24-70 would be the primary, and the TS-E 17 would be for the special shots. If you're going to be crunched for time, then the 16-35 II offers good IQ but is much more versatile.
14mm II does take ND filters in the rear gel holder.