I think its cyclical....
We did ours a few years ago....and it seems to be a "new trend" to base the branding and tagline on "mission, purpose, creed", etc....at least that is the way I see it....
that is not to say the old brands were not like that...but I recall a
thread here on GC discussing, brands and taglines and how the trend then was 3 "strong" words...
Sigma happens to use 3 strong words, that is formulated from our Mission Statement.
I don't think its time for re-branding, but I do think its time for a redesign of our website.