I am of two minds on this. I think using Arial Narrow has sometimes caused grief when generating postscript for some print shops. It is not a standard font. For this reason alone changing it to the standard Arial is probably a good idea.
It is a really great font to use for candidate names though. You get away without wrapped candidate text a lot more with this font. Changing to narrow after you discover you have one annoying candidate name is a big pain with GEMS also.
I'll change it if there are no objections, but then people using 4 column artwork should be made aware of the change. Be prepared to change it back to narrow to handle names that encode a candidate's entire family history.