Well, I think the various ideas being thrown around for Phoenicia here in the forums were way more ambitious than what we actually received. Some of us thought cothons would be some kind of canal or seal/land hybrid. Then there were all those ideas about Phoenicia being able to recruit mercenaries from other civ's.
I personally was hoping that the devs would realize that what they did with the entertainment district and water park could work just as well for commercial hubs and harbors. I had hopes that harbors would be split into two separate districts, one commercial and the other naval. The cothon would be a replacement for the latter.
So with Dido you can move the capital, which pretty much only has the benefit of projecting capital loyalty pressure. Then she grants some abilities having to do with the one-per-empire government plaza, which is separate and apart from having anything to do with the capital, so it's not as if the government plaza can be packed up and moved and thereby broaden the UA's utility.
I was reading on Well of Souls that they start with the the eureka for Writing. What's that all about?