For what its worth, I have uploaded an extensive variant for The Fall of Rome (S&T 39 version). It strips away minutiae in an effort to bring greater clarity to the core system. As a result, certain rules may be omitted. In some cases, existing rules may have been altered and some new rules may have been added; in effort to ease gameplay.
If interested, here is the BGG file link:
Note: The use of additional game pieces have been added. Wooden cubes and translucent chips are suggested, of course these may be substituted with whatever you have on-hand.
Thanks to Neopeius for allowing me to use his editable file of the original rules (complete with errata).