Game of Thrones - Three Kingdoms Mod

I'm working on a custom game board for one of my favorite board games, Game of Thrones. The original theme and board design are great, but after a dozen or more plays, we're getting a little bored with the same set-up each time.

The setting I've chosen for my custom board is the Three Kingdoms era of ancient China (popularized by Dynasty Warriors, Romance of the Three Kingdoms, and a new John Woo film!). The house metaphor of Game of Thrones translates pretty well to the many warring kingdoms and factions of the Three Kingdoms era, and the units (foot, cavalry, siege engines) matches the style of warfare pretty well too.

I've laid out a new board based on several maps of China that I googled. China, a large landmass with relatively little coastline, is a huge departure from Westeros, which is basically an analog of the British Isles. I'm guessing this may weaken the value of ship units. However, I have made China's two largest rivers -- the Yangtze and Yellow -- navigable board spaces.

I plan to make new House cards based on notable characters from the setting, like Guan Yu, Sun Ce, and Lu Bu. (I have chosen 5 factions to replace the Westeros houses: Wu, Shu, Wei, Dong Zhuo, and Yuan Shao.) Of course, the Yellow Turban Rebellion replaces the Wildlings as an external threat. And I'd like to replace the Iron Throne, Valyrian Steel Blade, and Messenger Raven with suitable analogs: The Emperor's Jade Seal, Blue Dragon (Guan Yu's big halberd thingie), and Red Hare (the "horse of horses").