i find i have a few problems.
First, some of the ship icons look very similar to others at a glance.
Second, in a group ship icons tend to blur together. This is the biggy I think.
Third, theres no easy way of telling a capital ship from a small ship at a distance at a glance, you have to actually *look* at them. Maybe capital ships should be brighter or bordered or something.
I like how the ship-shape (heh) icons actually resemble the battle, though. i would rather not have symbols... Though the point about how it was implemented in Supreme Commander is a good one, they got away with it.

This is just with the tiny group you have at the start. The amorphous blob on the right is a Kol with a single frigate. The one on the left is the shipyard with a couple frigates...yargh.
Maybe if they were higher res?
Or maybe frigates should be symbols, cruisers larger ones, and Capital Ships icons.