As far as units people are sleeping on.
The OP mentions the E-Web and FD turret. I've played with and against both of these and have always been underwhelmed. EWeb is too easy to kill due to range and dice.
The FD I keep thinking is going to be good, but it dies so easy as well. If it doesn't get a really good couple of shots off, or if the enemy rolls blocks, it can't make up its points, much less protect a flank or prevent advancement. If you pour a bunch of points into it for control and better more reliable shots, it feels like more of a waste of points.
That's just my experience. I"ve made a long-range list but don't really want to play it because it sounds so boring and un-fun.
( Cassian rifle, 3 units of troopers with DLT20, units of Pathfinder with Pao, 2 Snipers, 2 FD turrets with uplink and generators)