well, I am done waiting for the Canon 14-24mm....
I like UWA lenses, and have a nice set of primes on that range.
The 17-40 is not keeping me happy anymore, but indeed was/is a very nice multi tasking lens for travelling and hiking on the light.
Tried the 16-35 mk2, and was not please with color rendition.
Tried the nikon 14-24mm with an adapter, and the the f value guessing work is really a pain - don't mind the MF focus, and compose all open, but often had to re-take the picture due to overexposing; only with live view the reading was coming correct ( maybe I can blame the cheap adapter?)
The 24-70 mk2 is very sharp and has a nice IQ but not an UWA, and old R leica lenses do not offer anything of interest as UWA zooms.
So, I decided to go after the Sigma 14-24 mk2 - yes, a compromise of many sorts, but I need it now for use - not whenever if ever Canon decides to release it.
Paired with my 24-105, I have all I need for hiking and travelling light.
Thanks for nothing Canon