I have seen the light. Support class is awesome, even if you choose not to use medipacks. They travel farther than everybody, they can potentially take two shots at dudes from overwatch, they can carry a scope and chitin armor in a pinch... I think once I get my guy kitted out in some ghost armor he'll be fucking lethal!
I'm now trying to design my team as 2 gun-slinging snipers, 2 supports and 2 assault dudes. They should be good to go in almost any situation.