I always look at the worst part about a toy even if I like them, so here goes:
-Rattrap's good, but very small and the rat mode had basically no articulation. He's more of a complimentary piece to the deluxe, but not an upgrade (though, the new one has better proportions and has double jointed knees)
-Primal looks good, but has a few problems. Some parts are extremely tight while others are too lose, the arms are specially worrisome but I have no clue how to fix this since the arms use tons of pins. The white tights will chip if you aren't careful posing it, and doing the quad gorilla pose will also damage the paint with the back cover. Finally, opening the torso is horrifying since it's super tight, I ended ended up cutting the taps so I wouldn't damage the faces or robot chest when I had to transform it.