There are a few downsides to this version of TR, for some reason they left the Britons out of the game, the British isles are now populated by rebels, and the cities keep revolting, very difficult to keep the peace in that place. But leaving out the Britons as a faction is a historical blunder at the very least.
I'm also a bit worried if i ever get to see the Marius reform in the game's current setup. In the original campaign it came around 220 BC, in the first two versions of TR it came randomly between 210 and 185 BC, but at this moment i've reached the year 174 BC, and no signs of marius yet, i'm still doing battle with the same units as you start out with.
If i'm not mistaken, Marius rose to power somewhat around 112 BC, and if they try to keep the game historically correct, i wonder if i ever get to that point in time. Then again...if they are so concerned with historical correctness, they shouldn't have taken out the Britons. :shrug: