I actually have been playtesting both of your and Mr. Pjetski variants of Anvilstirke lists for quite some time and found myself completely helpless against anything that can charge turn one. And now seeing your current thoughts are just proving the point those test results shown. Basically facing anything like Bestigors, Eels, TG's are just a 90% loss. Nothing to use as a reliable screen, Evocators just pop off the board without even hitting anything, 5 man Liberators battleline fillers are a complete joke. Used all the possible combinations of deployment strats ( Board Edge, all key units in Azyr, all key units on the board etc) - this just doesn't seem to work anymore. As long as you are able to snipe the heroes with Raptors all of your troops pretty much wiped out by other stuff.
Might as well just return to generic Gav lists along with Balistar. They at least stand a chance against some lists and not that fragile to alpha strikes.