Everyone keeps complaining how They lost xx millions of stats just to get one unit? If you played full assault the correct way you would only be sacrificing cash units. You may lose stats now, but 2 things can happen from this.
1. You are only losing units that you can buy back in the store. Build your iph and continue to buy them and your stats will stay the same at a minimum.
2. You are going to get a good unit, plus a boost that lasts a lifetime.
So yeah, you will sacrifice now, but the cash units can be bought again, and in the end you will gain from the boost.
Unless of course you're sacrificing all your high end units, in which case would bring me to my first point that you're not playing full assault correctly. Best of luck to all the trolls that come on here and tell me how wrong I am and how this event is horrible and blah blah blah. This is the first event that actually requires strategy, which everyone here has been complaining the game has been favored to those who will spend the most. Adapt or quit complaining.