There is also another difference between DL and WDW you fail to consider. There are more attractions and lower attendance at DL. This means that closing an attraction, especially an e-ticket, will have a greater negative impact at WDW.
But you sir also forget that there is more attractions on a whole at WDW then there is at the DL resort. The majority of the posters on this thread act as if the world is coming to an end just because one attraction in the MK is closed for two months!
Yes the majority of DL attendance is local but Im sure WDW attracts the same amount of locals during certin points of the year as DL! You can also bet that there are still out of state guest that go to Disneyland and complain that the orginal HM is closed.
The truth is no one on this board has the right to say that HMH will not succed here at WDW! NO ONE! The only way we will ever know is if or when they do it!