From our research the best and strongest way to splice is the direct bury, it is also one of the easiest if done correctly.
We don't splice the XD because of the way the rope is built, with the cover shielding the inner 12 strand rope. The cover does do a great job of protecting the rope, we have seen some over 5 years old that have a cover that looks well worn but the core is still in excellent shape.
As said earlier the yellow safety style hook can seize up if it is not kept greased, I personally don't like this hook but many people do. It is fairly popular in the southwest and other arid regions.
If you guys are looking for a rope with a safety thimble we have recently begin producing our own version called a Winch Stop:
-Alex