TDO: "They're tourists... Whadda they know?"
As you noted, TDO's MO in the past 10 years has been to do as little as possible, and things that must get done should be done as cheaply as possible. Until they give us a reason to expect more, I would expect little out of TDO for the 50th at this point beyond cupcakes, merchandise, and decorations. And cheap PR stunts.
As someone who was there during the 10th, 15th, 20th, and 25th anniversary celebrations (and can still remember nearly everyone walking thru the turn styles getting a prize for the 10th (or was it the 15th?) anniversary), plus the Millennium and 100 Years of Magic celebrations, it is almost physically painful to see what TDO has turned into and what they have done with WDW. They used to actually celebrate notable anniversaries. Now, a "celebration" to TDO is cupcakes and merchandise and "how else can we make money from this?". A sad statement on a once-great organization.