I’ll get to that
I’m fine testing that as well if you wish
At this point, I feel like these variant rules are a success, but I would only recommend them for players who are already fairly comfortable with Codex overall, as both designing a starter for yourself and deciding how to react to your opponent’s starter extend Codex’s already lengthy learning curve. But for veterans with any interest in this game mode, I recommend trying it at least once.
I agree, the analysis of what your opponent could do gets pretty complicated when the starter is screwy. I do think it is possible to create very powerful and very weak starters this way, but it was fun to try.