FCSS arty is OP

[Tcao]

OK, guess before me there are hundreds of complaint saying FCSS arty is OP.
I know alots of devastated FCSS arty strike comes down to tactic, execution. But some of the outcry can be justified.
Here are two examples

arty claim 1 fcss.jpg (16.13 KiB) Viewed 69 times

How come 5 rounds of 155mm can destroy 7 x BMP-1s
if this example can be justified as observer guide and adjusting the fire

arty claim 2 fcss.jpg (27.6 KiB) Viewed 69 times

here is another example, how come a blind fire Barrage kills 13 x T-55 with 8 rounds of 155mm?