All of the above. I think its buggy. It should report Asgrens, but it sometimes does not.
Ability is crazy useful right now. In large team games I can tell teammates what they are about to see, and if a Ost player builds a sniper I can put myself in a position to kill it on the first shot. In addition, since built units appear at the closest exit point to where they are rallied I even know where units are going when they are pulled.
This. It´s easy to know where the early units are going to be pushing.
Vs grens, sacrifice capping n go for the number advantage on engagement/molotov
Vs mgs, prepare your flanking attack.
Vs mortar, just push forward.
On 3v3+ can be a bit confusing with the mount of information, but on 2v2 it´s really fine till mid/late game.