If gringotts takes over from Coinshop as primary market maker it makes the game much more decentralised, previously with risto in control of so many things there was a lot of unavoidable perception of possible conflicts of interest, but now that's gone, and CK has a sizable war chest for development and promotion, awesome!
While I agree that Gringotts market making activities will help CK become less centralized, I should mention that we don't see Gringotts ever taking over from Coinshop functions.
Market making is something every player can do, and it's one of the basic strategies players can use to make money in the game, including Game accounts controlled by admins.
Gringotts will be happy to see a Game controlled Coinshop active in Agora again when play resumes, hopefully there will be too many markets for one single entity to provide liquidity for.