Preview Review of Adventures in Middle-earth Dungeons & Dragons 5th Edition Player's Guide
I was one of the first 70 to get the early TOR rules, and we have been running it at our annual TolkienMoot.org ever since.
I like what I see with the d20 version. I have had very good results with TOR's system but it is far from the mainstream and not easy to find/buy, but d20 is the lingua franca of RPG.
I am going to be heavily play-testing this with group(s) over the next few months, but if it goes as I suspect, I may very well adopt this system and setting as the primary use for Fantasy RPG for education and therapy clients. I have been running Tolkien-based campaigns since the early 80s.
The "TOR-ification" of D&D in this release, greatly tones down some of the "problems" with D&D, and greatly enhances more cooperative play far more than default d20.
It has effective rules that help encourage much more supportive shared roles between the party and directly supporting each other, tracking of cumulative "bad" choices with the Shadow and Corruption features (alignment if removed).
And of course, with my strong Tolkien background as founder of the Ea Tolkien Society (TolkienScholars.org), an official Smial of the U.K. Tolkien society, it seems an ideal fit. I'll report back in a few months on the results.
UPDATE 20161212: You can read the full preview here now: