So the announcement regarding Disneyland Paris really helps put the MGM "fix" into perspective. Both MGM and Studios Paris were broken parks, but Paris is getting three large, intricately-themed new lands, plus other additions like Swinging Saucers for their TSL. MGM is getting a net gain of three rides, two of which are essentially carnival rides.
Disney seems fairly convinced that WDW guests don't demand the same quality that patrons at their international parks do. Rides like Mystic Manor and Shanghai Pirates make this really clear (I still hold out hope Alcatraz will reach that level). And when you look at this newly announced expansion or the changes coming to TDL (or anything at TDL, really) its hard not to get frustrated.
I wonder the degree to which DVC plays into this. My understanding is the international parks don't get the hulking DVC additions that blight the Orlando resort and that DVC points don't work particularly well at those parks. To what extent is DVC an American phenomenon? It seems possible that American tourists' willingness to legally bind themselves to give money to WDW for decades, regardless of the quality of the parks, might account to some extent for management's different attitudes to the US vs the international resorts. There may be nothing to that idea, I'm just a bit curious.