Wow, I'm not going to read through all this.
Let me add why "Yes" makes sense though. Head-to-head is primarily for online leagues. If Markus can include it in a patch 3 weeks from now, that's fine, as most leagues will be converting to V6 either in a while, or even if immediately, they have an offseason to go through, in which case H2H is not needed right now. Add it later. Game now.