More armor doesn’t solve anything.
The Ursoc’s Fury buff might have been okay… IF you hadn’t done stuff like moved Flashing Claws from the middle section into the bottom, basically making it inaccessible.
The bear’s biggest problems are magic damage (which it still has no defense against, except its major cooldowns), and its horrible and bloated tree.
Please read my analysis here, you might find it helpful.
The way to “open up” the bottom section of a tree is to consolidate and reduce the number of talents. NOT to add more like you did.