This is really the crux of the matter -- "It's the vision thing." Turbine is NOT the same company it was when purchased by WBIE back in April of 2010.
Professionally, I've been down this exact same road twice before -- A DEC Alpha user when Compaq purchased DEC, and a Compaq Alpha user when HP purchased Compaq.
Sadly, the purpose in all 3 acquisitions had nothing to do with the technologies available. The sole purpose was the acquisition of "Customers" and "Intellectual Property."
In acquiring Turbine, WB acquired the only Intellectual Property Licenses for Tolkien's work which they did not previously have. Today, ALL licenses for Tolkien's IP are held by WB in one division or another. Obviously, "the suits" believe(d) that this gives them a "strong hand" in negotiating with Saul Zaentz Middle Earth Enterprises and ultimately with Christopher Tolkien.
From all available information, it appears that the primary thrust of this acquisition was in support of the Warner Brothers "gaming" operations -- i.e. Casinos. Hence the current fight with Christopher Tolkien over WB's "right" to create LOTR Slot Machines. (I have no idea if this is still in progress or has been settled "out of court" -- there has been no news since the counter-suit filed by WB back in January of 2013.) Oh well...
Keep in mind Tolkien himself sold ALL rights to LOTR back in the late 1960s to some dude in California name of Saul Zaentz. His company, now doing business as "Tolkien Enterprises" is the entity who has licensed the IP to Warner Brothers. Tolkien is reported to have said at the time of the signing -- "I'll sign this, they won't ever make money from it because it's impossible, and I'll get the money anyway." Christopher Tolkien's lawsuits have all be about the fact that his father signed away ALL RIGHTS to LOTR, and he saw the billions in profits that New Line generated from Jackson's films.... and as they say, the rest is history.
One last comment, DDO does have "the same" Mac client as does LOTRO. It does not appear to have many of the same problems of the LOTRO client, I would assume simply because DDO is a much less demanding game "graphically." (The DDO client is only 7Gb patched vs 23GB for the Mac Client!)