I haven't really noticed a change. I suspect they are pulling out all the stops on AH2 and will reveal more when they feel the project is at a sufficiently advanced stage. They couldn't release information (screenshorts) early, considering the dissapointment it might engender if any changes were made at a later date.
Personally, Guadacanal will probably mark a break from AH for me until the autumn and the advent of AH2. I haven't played AH in a couple of months.