Truth be told, Stone Heart isn't something I always focus on, but I've been hacking my way through with a lot of merry RBS-swinging warriors recently. And if I'm a monk and somehow haven't found the Might glyph, Stone Form is a lovely little gem for protracted combat encounters that *aren't* on the same screen as Binlor, as is the case in 3 out of 4 vicious dungeons (Naga City being a deliberate reversal of this rule).*
But most of all ... well, damn, the way things work now, Stone Form and Stone Fist are just so
poetic in action together.

* By the way, Namtar's going to undergo a post-Curse revision that will affect his power above AND below -- players shall truly know how it feels to be cut off from the gods (muaha, etc), and I actually want to balance things so that you weaken at a rate more comparable to Namtar's own. I don't think many modern characters fear his last few incarnations once they've gotten past the earlier doozies.