I have found that several online retailers misspell it as ‘Erewhon’. That is the spelling for Butler’s 1872 novel.
I would have thought both Romans and Samurai would work as Knights.
Personally, I would prefer fewer, more generic lists. It already bothers me that Gnolls are separate to Beastmen! 😁
I have to say I really like the idea of a cap on order dice, no matter how many units are on the board. I would cap it at 12, so that players don’t have to buy a second set of dice, but wind up only actually using a handful. Most dice I have planned at 2000pts is 16.