I've restarted the new game + and I haven't gotten to it yet and I also think that the comparison would be hard to make because of the weapons difference.That's just not right, can you take a video? Sounds like something is majorly mess up with your game
I just don't use shocktroopers basically because against infantry Scouts are a one turn kill anyway and against Armor they have proved themselves to be useless for me.
The effectiveness of interception fire at higher framerates also makes using the flamethrower and in general approaching to make the most out of their weapons really costly most of the times.