Oh dear. What a storm this has produced. For me, there are a few fundamental issues here.
The first is the undermining of your lead designer brought about by this u-decision. Alex has been very vocal and happy about the new damage deck. He has explained in great length why he did and how he feels it allows him and his team to address issues they never knew would exist when they designed the original deck with the core set. Thinks like the blinded pilot/ accuracy corrector issues and such. By OP allowing you to chose between either it seems like a big middle finger at Alex and the team who have worked hard to rebalance the core game without any major overhauls to bring it in line with rules and concepts that simply didn't exist the first time around.this alone gives me reason to be sad with FFG over this decision, and we've not even gotten into the mechanical implications of the ruling yet.
My second major concern is we will now have multiple cards with the same name with different gaming implications. Two blinded pilots. Two damaged sensor arrays ect. This is just untidy from a game perspective. It creates unneeded confusion and if anything hinders newer players even more. For those of us with a GW background, the convent of this feels like having two different editions of armies legal at the same time. Well I preferred the vehicle rules for guard from the 4 th edition book so I'll run that book for my mech guard whilst at the same time my opponent liked the new infantry rules from the 5th edition book so he's running that against me. So now my identically names unit has different rules to remember that his!? What!?!
As for which deck is legal, I don't care. But I do want consistency. Of course I'm pro choice and options, but this isn't an option is it. There's no incentive to take the deck which is worse for your list. There's no stratergy. There's no opponent interaction. It doesn't feel like part of the game in the same way list building does. There every choice I make influences me and my opponent. So does choosing asteroids, if effects the board and game as a whole. Choosing my damage deck only effects me and I'm not going to lie, I already feel dirty as I go through my potential tourney lists for next year thinking 'deck a for then, b for that one, b again for that one...,
I can't help but feel that surely there's a better way than this