Western scholars love him for some reason (as the study of the constantly ongoing brutality of Russian culture, perhaps?)
Maybe it's harder to appreciate it now, I can definitely understand why it would be.
Karamazov was much harder for me to read than C&P or The Idiot, and I liked the other two best.
That said, it's well worth it to read the famous passages, they are incredible prose
It's also interesting to consider each character (disregarding minor characters) all of as an orthogonal dimension of a single person (by no means scientific): the inner-monkey (Dmitri), hyper-intellect (Ivan), spiritual/altruistic (Alyosha). From this perspective, the work is a solipsistic study on how inner-conflict manifests outwardly into the world.
I don't think the intention was to appeal to the west but I think it does make it easier for westerners today to approach and appreciate his work.