Qiki

So why a zoom, and why 2.8? Given the sort of shots they're almost always used for, does anybody really use UWs at their long end? And does anybody really need them to be 2.8? In my DSLR days I used the (lovely) Sigma 10-20 f/4-5.6. But shot almost everything around 10mm and f/8. And I think most people I know who use UWs do pretty much the same. So, why not develop a nice, compact 10mm f/4?

Yes, I can see your dilemma. If it's any consolation, your 1st pic looks good as it is (not pixel peeped). I wouldn't be able to tell by just looking whether it was xpro2 or x100. I'm not sure if this will help as I understand that different people have different standards. As it is, I think your street photography is good.

So why a zoom, and why 2.8? Given the sort of shots they're almost always used for, does anybody really use UWs at their long end? And does anybody really need them to be 2.8? In my DSLR days I used the (lovely) Sigma 10-20 f/4-5.6. But shot almost everything around 10mm and f/8. And I think most people I know who use UWs do pretty much the same. So, why not develop a nice, compact 10mm f/4?