an elder race that falls from grace because of its own hubris, abandoned by its gods
Again, you're painting in very broad strokes, so this point does seem similar in those terms. Of course, it's not at all clear that this is actually an accurate description of what happened with the Elves in DA.
dwarves in DA are practically ripped out of Middle Earth and handed politics
I guess if your only criteria is the fact that they are dwarves, then sure, there's no difference whatsoever. Of course, usually when people say things are copied they have somewhat more specific criteria than that.
I could go into the issues of Ferelden's throne being similar to that of Gondor's, but I'll avoid going too deep in there.
I actually wish you would elaborate, because that's nonsense. Gondor's last king died many years before and it has instead been ruled by a line of stewards, until Aragorn (basically a great-great-great-grand-nephew of the last king) shows up and only reclaims it because he needs to (for the war of the ring, but also for marriage reasons). There isn't even a power struggle over the throne, since the last Steward kills himself. Aragorn demonstrates his worth as a king and then he is accepted. The conflict in Fereldan has *no* resemblance to this whatsoever, except that there is some period of time where there is no king.
Darkspawn and orcs being practically identical, even down to both being led by a fallen God, and utterly aimless without said guidance.
Nope. Darkspawn are mindless creatures who gain organization and direction when led by an Old God. Tolkien's orcs are monstrous, but they do have free will and, when left to their own devices, they form into organized tribal units that act independently. The independent behaviors of individual orcs are demonstrated repeatedly in Tolkien's works, as well as intertribal conflicts (even during the War of the Ring, when they should all be working together). It's true that they have a history of willfully following dark forces (first Morgoth, who originally created them, and then later Sauron), but they are fully sapient individuals regardless. The only comparable example in DA is the Architect's work.
Or shall I instead compare themes and messages? Because those are pretty identical too.
If you want, because so far your argument is pretty flimsy.