Game Balance and Matchmaking - We want your feedback!

So not only is the sandstorm really good, cyborgs are even better. In fact cyborgs wreck almost every single GDI unit. The problem I've come across being at a high rating is I can't customize army to counter units my build is weak to because I simply can't obtain the units needed. I have to basically just sit and wait now and hope that my daily boxes contain new units.