your questions regarding the game rules (improving the interpretation).

With the introduction of bidding in SoD, I would suggest basically removing the same-color rule and generating a random pair of towns by default, after which bidding for the town and color would take place. This would also add variety to the games. There would be many interesting pairs with 4K+ rollbacks like Dungeon-Tower and Necro-Inferno, rather than the eternal standards like Rampart-Castle.

p.s. Accordingly, the very concept of "redrush" becomes irrelevant, since the price of the red color will include the ability to redrush as well.