After playing this game on Insane i must say that both of these units contribute to this game being very RNG instead of Strategic making it almost impossible to play Ironman on this difficulty, it starts with the fact that on Insane your units are killed right away instead of being downed so lets analyze a little bit those 2 units, comparing them with their Gears of War main series and how they are in Gears Tactics.
Can make your unit vulnerable even when he is far away without the unit being in his line of sight.
He is very accurate on his Torque Bow shots and can deal with pretty much every type of cover without needing to have a full sight of your character while flanking, Torque bow in this game works very differently from Torque Bow in Gears main series, here the arrow dont need to stick to the target for it be 1 shot, here it explodes conveniently and dont stick to target.
The biggest problem of that behaviour is when he is targetting your full covered target as he aims to his side and explodes right near him instead of moving all the way down past him, Torque Bow shots should be a guaranteed kill when he is flanking you, but less accurate when youre in half cover, and almost impossible to hit when youre in full cover unless the angle permits him to target some bodypart of your character.
Boomer in this game are vastly superior to the Main Games as he aims much better, and can deal very accurate shots by lobbing the Shot over fullcover and halfcover, and having an big effective range, 1 shotting you in a multitude of ways when youre not really that much closer to him, making almost impossible to survive his turn if he is close to you, Main Series boomer couldnt lob the Shot that high and had an limited effective usage.
Hope that is enough to understand my message.
Ps: This game is fun and i wish we can have a sequel with a few improvements.