I do volume swells all the time, using standard control layout. I use the tone control, a lot, but I do not use it as a wah effect, like Roy Buchanan did. I do not like the volume control to be too close to the strings. For instance, I find volume swells to be rather difficult on a Strat, simply because the volume control is so close to the strings.
I had Chris reverse the control plate on my new K-Line tele...I love it. I like to turn my amp up to 10 and control volume and gain with my volume knob, so having easy access to my volume control is absolutely essential for me. I play a lot with pinky volume swells too, and I always had a hard time doing them on teles with the normal control plate. I don't switch pickup positions very often, so having the pickup selector out of the way was also convenient for me.
Standard. I've bought teles that had the control plate reversed and quickly put it back to standard. Everything is exactly where it should be in standard, for me.
I use the controls all the time but I'm so used to them being there where Leo put them, but I also think everyone should do what they need to optimize their guitar for their own playing so if you like it better reversed, by all means, go for it.
Reverse for me (and I do have a Bigsby on my Tele) - I rarely ever switch pickups mid-song (and if I do, it's no problem reaching around the Bigsby) - I use the vol. pot more often than the pickup switch, actually, that's why I like to have it in front...