Perceived limitations of using UC RN in an harmonic analysis

It has been proposed (accused?) by Lemuel J Schenck (can I call you 
"Lemmy"?) that for some reason using upper case Roman numerals in an 
harmonic analysis in and of itself somehow puts many limitations on the 
analysis than using lower case Roman numerals would.

Anybody here care to attempt to demonstrate how merely UC RNs is 
necessarily more limited in and of itself?

I'll start it off...
The only thing I can think of is that in the systems of UC oriented jazz 
analysis that I am accustomed to there is no way to indicate inversions 
within the analysis. But then again, there isn't really any need to 
indicate inversion within the analysis because any inversion would be 
made clear by the accompanying chord symbols.
Eg. C/E (in C) would just be analyzed as I.

So, while this may appear to be a liability, it's actually an advantage 
of the system, at least the way I see it.

-- 
Joey Goldstein
<http://www.joeygoldstein.com>
<http://homepage.mac.com/josephgoldstein/AudioClips/audio.htm>
joegold AT sympatico DOT ca