Your assessment is pretty much correct. I don’t have much of a problem with Lava Bomb personally, I find it softens them up and guards bodies fine, but Rock Door & Tongue Slap are very serious issues. He has to remain immobile and trade so much health to get his attacks off that those attacks need to work consistently. I’ve seen Tongue Grabs pass right through/near/around Hunters that would have been easily grabbed by an Abduction, doing no damage, and it doesn’t pull a lot of things at all, including DAISY! Rock Wall has gotten even more sensitive to every little dust particle in its path - it really, really, really badly needs to clip through most things; we’re talking about giant, jagged chunks of mountainous earth, I think that beats a trapjaw or a tyrant even, let alone a destructible tree or shrubbery.
The other issue is that when he is rolling most wildlife needs to be pushed out of his way (not armadons, crowbills or other large creatures, but everything else), and small wildlife like obsidian grubs, glaciopods, reavers & spotters should simply take massive roll damage so they are killed right away and he can roll over them. There’s a lot of things in the environment, including very small wildlife, that blocks his path and forces him to change direction entirely while rolling, which is especially bad when he’s trying to escape the Hunters. I think some of the changes they implemented to get rid of the roll stunlock and roll cancel-melee exploits resulted in a bit of an overnerf to his traversal and possibly his melee.