I think it should be named something like 10.5.2 for AMD - Zephyroth Rev.2 (or 10.5.1 for AMD - Zephyroth Rev.2).
Whatever will be included, this will be the second release from Zephiroth, so Rev.2 seems right to me even if it isn't perfectly appropriate.

Patiently waiting for the next release, anyway you name it.