Jeffrey -
"I hate looking through a small viewfinder all day, I prefer to see the shot with 2 eyes (Hence the term View Camera, seen with 2 eyes)"
Live view on the Canon (5d2) lcd is excellent, and you can tether live view with Canon software.
"HUGE ISSUE:, no lateral shift in combination with vertical shift, yes you can shift T/S or PC lenses in a similar way but its not the same control"
Since you mentioned the SWA (of course about size, but you did include it and you do use it), that is rise/fall only, or shift only if you reverse it, so no combo possible. While I agree the combo possible on dslr pc lenses is limiting in comparison, the more I use it the more I learn to work within its limitations, and it's a rare situation that I need more than the canon offers.
"Working with a slower (however not bigger in the case of the Alpa SWA) camera will improve anyones work. More time spent with each shot will make it a better shot."
One can shoot any camera slowly, but one cannot shoot any camera quickly.
"CA/Purple fringing on the lenses, yes correctable but another step." "When needing something wider than 24 you'd need to do perspective correction. Now the 17TS is available which sounds great but was not available when I made my decisions. I cannot see spending the time or effort on site to correct perspective in order to fine tune whats in frame or out or to show it to the client."
The new 17 and 24 are game changers. If you haven't used them you should at least try and then judge. No fringing, no distortion. The 23 Rodenstock has massive distortion compared to the 17tse. Also the screen on the Canon is good enough to show the client. Canon does need to make a 32/35 tse, 65/70tse, and update the 45.
I use the Alpa Max/MFDB too and it creates the best files. The Schneider and Rodenstock lenses are superior, no doubt. But more and more my reasons for using the "bigger" system are purely emotional. I like the way the Alpa works, and I like the results. It's satisfying. I cannot say the same about the Canon, it doesn't have the feeling, and at first I hated it. But it works in most situations flawlessly.
I chose the Alpa before the 17 and new 24 were announced, before the 5d2 was announced even. I saw it and pulled out the credit card before it even crossed the counter at the shop. At the time there was no question how to go from 4x5 to digital. Now there is, and, no regrets, but I don't think I'd spend money the same way.