Why not a tank/aa vehicle with a small radar on it. Good for T1. And early expansion. It can also spot mines.... Hate building t1 radars everywhere. Also later in game for artilery its nice to have a radar tank. Maybe also a radar gunboat?
I think the t1 scout works just fine for this, it's not as big a vision as a radar, but mobile. I would like to see an ecm gunboat with light AA, big vision/radar, and puts up false radar images. Maybe also a t2 ecm tank, would have a large radar/vision, mine sweeping, and the ability to hack tactical missiles and return to sender them with some kind of percentage chance, or maybe just a random redirect of the missile.