I say let them bring the new codex. They'll have less to whine about when they lose.
It's a great point you make, eloquent too. That said, are you sure that you'll be okay not getting an auto-win in Kill point missions won't ruin your day?
I'd like to see the new codex in use, I think I may have already burned my old one
I cannot imagine any guard player not being ready to go with that as soon as it's released.
Will it cause confusion problems? I find that unlikely given the amount of noise we've seen surrounding it over the last few months. The store has a copy so anyone curious can start reading now, it's not like we all buy each dex as soon as it comes out anyway.
For my own personal preference, I'd rather it was allowed because, well I play guard, I want to play with the new toys GW want me to buy, and I've waited long enough..!!
When will that decision be made?
Cheers,
Alan