I like the switch to green, 'thought purple worked for me as well. While I can understand wanting to veer away from looking like ‘Independance Day,’ the last mock-up had such large, simple ships that they grabbed you intantly and now, I kind of find myself struggling to make out what is going on. Partly it’s because these new ships are much darker, not a mass of light like the last ones. But it could also have to do with the quantity of them: The last image had a fer large ships, and this feel like more numerous, smaller ships because of the sheer number of “fins.” Have you tried going with fewer ones?
Best of luck!