-First thing, the Wapanese voice acting freakin rocks, but the quality isn't that great

-The game play feels only slightly better than ZX
-The guardian models feels more like "ver 1.5"
-If you want to feel a different/better version of the guardian models, go use Ashe. She has all the new charge attacks while Grey have all the old ones from ZX. (EX: Grey's Model F charge shot is the fireball/firewave attack. Ashe's Model F charge shot is shooting a powerful explosive that could do MASSIVE damage if it hits right)
-The game feels bit on the short side, but that's me power-playing through the game

-Model ZX isn't the secret model. There's another secret model I have yet to discover...
-There's only two difficulty, Beginner and Expert, no normal. Beginner is WAY WAY too easy while Expert is quite difficult and a big leap from the beginner mode.
-As we expected, most of the boss copy models are mostly for puzzle use.
Basically, if you loved ZX, or though ZX lacked something. ZX:A would feel just right
If you wanna ask more, go ahead :3