Only problems with the 703 were:
Less reliable
More expensive
Less controllable
More parts
Center of Balance moved forward
Heavier
The recent op-rod craze had re-affirmed the collossal failure that the 703 was, since most people have never heard of it. An op-rod system on an AR is stepping backwards in so many ways, but all the gun ragazine articles cliaming its superior reliability have propagandized buyers to actually believe that they are better, so a whole new cottage industry has exploded, making op-rod driven AR's.
For a collector's standpoint, it would be one of the most rare AR's to own, if not the rarest.
From a could have been standpoint, thank goodness it wasn't. I do like the sling loop in the buttstock though.