I'm trying very hard to make it a competitive list. I feel like it's almost there, but you are giving up a significant firepower over an XXBB list for the trade off of better positioning and board control... So it requires a high degree of skill to fly well whereas an XXBB list might be more forgiving. So I don't know if I'm just not quite good enough with it, or if it's just not quite good enough to cut it.
I don't really know if I'd call it a reactionary list though (sorry if I did above)... It's more of an adaptive list, but you still force the opponent to play on your terms. An adaptive list would adapt to the enemy terms (I think the Defender will fall into this category).
If it requires a high degree of skill, is it really adaptive? It seems to me that requiring a high degree of skill equates to being aware of certain things you shouldn't do. If there are many of those things, doesn't it make it less versatile and less adaptive?
(Again, I'm new to the abstract conceptualizing of this stuff, and just trying to understand. I ain't lookin' to take you down.)
In a Rock-Paper-Scissors world, the man with a multitool is king.
While you may not have an overwhelming response to any meta you meet, you've at least got something.
If I pack a TIE Swarm, I know that Assault Missiles are going to ruin my day. If I bring BBBB, I know that Ions are going to make me miserable.
In this instance, he's hoping to have at least some response to every possible list, so while you may run a squad that's 100% against 50% of the Meta, he's hoping for 50% against 100% of the Meta and trusting that player skill will make the difference (which is most often the case).