hubs will have an affect on demand [similar to alliance's codeshare effect, however it will not affect anyone but that player regardless of circumstance]. there will also be a nifty part that "undoes" some used demand on routes which should soften up competition a bit / offer more stable prices for the airline with a hub. focus cities will upgrade into hubs, and there will likely be a significantly lower cap for hubs then fc's [hubs will also be a lot more expensive, but yes]. on paper it looks good, i just need to finish it.