I just finished playing the Trajan campaign, and it's awesome! I am no expert by any means, still just a casual player, fyi. All five scenario's are well designed, with great story-telling, have plenty of eye-candy, good gameplay and the difficulty ramps up on the last two scenario's. The last one is a little tough and a thrill because of Ctesiphon's wonder countdown, but if you know what you are doing it's beatable (it took me more than one try). It's perfectly balanced. I loved the narration on the introduction and ending cinematics, and their illustrations/artwork. 5 star rating from me, excellent.

More importantly, I am having a lot of fun. I am immersed and loving every bit. Return of Rome is great!

Also, I'm just gonna leave this here: