Helicopters standard units?

I liked the facebook add, and i got helicopters. So, will they always be standard unit or just for some time?
Infantry have -4 defense against them, now PD will be much weaker and GC will be useless since infantry was the only defensive unit...

Personally, I think you need to fix few bugs that left (save button, glitched walls etc.); than see what you can do here: http://afterwind.com/forum/topic.php?topic_id=1883&topicsearch=&page=1 ; and than eventually add some extra units, cards etc.

But it's OK if it is for few days only, since this is good way to "make" people like facebook page.