For something different, maybe too different...
If you are a bit bored with the base game, it could be interesting to give it a try.
Managing to keep your family in power (you live in republic) is a real challenge, prestige is important, as are plots and bribes. But your game could also end too quickly.
You have to be a mastermind in diplomacy as republics are usually (at least at the beginning) not powerful militarily. Also, you can loose your trade posts during wars or when rulers change for less friendly ones. Not to mention the rivalry of others trade republics.
So I would say that may not please everybody (I have mixed feelings) but if you want to try to build a trade empire instead of a military one, this is quite entertaining for some time. But on the long term you may want to return to the base game or try new expansions.