Hi Bob,
I'm not Phil, but a number of years ago I had the same concerns about going to the full 2" classical neck after playing the "standard" width necks for so long.
I found that the human mind has marvelous "adaptive" abilities, and if you just take it slowly at first, within just a short period of time you'll be playing the wider neck with hardly any problems.
There is one, small, difference however, and that is if you use a lot of chords with a "thumb-over" on the bass strings, (Merle Travis style), you may have to learn them in the more "traditional", or classical style. It really depends on the size of your hands.
Conversely, you'll find (or at least I did), that when switching back to the more "standard" width necks, (1-11/16" and narrower) things feel much more "crowded", and I found that the best way to overcome that, was to play both the wide, and the narrower/standard necks on a regular basis!
If you get discouraged with the wider classical necks, just take a look at Muriel Anderson's videos on YouTube, and you'll realize that if she can play those wide necks with those little bitty hands, you shouldn't have any problems!
Hope this helps...
David