I agree with the OP. My main Char is a sci and prior to season 4 i loved the ground combat, but now it's over so quick that i don't have a chance to use much of my kits. And on top of that i'm a lot more squishy since season 4 so i get wiped out pretty damn quick. They nerfed the shields but didn't increase the heals to compensate.
In addition i've noticed that you can either spec for ground or spec for space, there's not enough experience to decently spec for both.