> queen is before lair and evo chamber
I don't see why that is a big deal anyway, toss need cyber core to get AA, so technically zerg AA is lower tier than toss...
Besides, people are too set in to builds at the moment, shaking things up is a great idea. The only problem is I doubt this will shake things up enough! Removing and adding high tier units won't have that much of an effect on builds since late game you are playing against your opponent, not just cookie cuttering builds.
The new zerg siege unit looks cool, it always annoyed me that our highest tier unit is our siege, makes it difficult to break toss cannoned positions. Hopefully this has more range than a cannon, and will be lower tier!