So in your opinion, the sniper in M3 is the only op unit/mechanic in the entire existence of coh2 that is worse than usf morter.
Just off the top of my head, i would say any of the following units/abilities before they were nerfed were worse than the usf morter....
1. Tiger Ace.
2. Windustry.
3. Flamer Rifles.
4. LMG obers
5. CAS
6. Strafe.
7. P47 rockets.
8. Stug E
9. 1 CP shocks.
10. Leig Suppression.
11. Brits Centaur/Crocodile/Bofors
12. ISU
13. Ost Flame Halftrack.
14. Sov M5
15. Sov ptrs spam.
16. Sov B4
Disclaimer : I am not supporting the morter, nor am i making any comment relating to the current balance between usf and ost. I am simply saying the usf morter is not the worst bs unit/ability to plague the game over its entire lifespan.
I hardly see how these were more gamebreaking. 12 are doctrinal therefore you didn't see them each game. Remaining 4 like Obers or Centaur still weren't first minute issue, therefore easier to prepare.
I don't recall that ony of these was actually seen every single game, hard to counter and completly shutted down infantry/weapons play. Maybe ISG suppression was close.
Tiger Ace was had to counter but it didn't stop you from using infantry with efficiency since it hit the field late. Etc etc etc
Only ISG with suppression could be worse than current mortar since it was seen everygame, it stopped from playinf infantry right away and was hard to counter.
The rest? Yea, issues, but not that common like Mortar, you didn't see them each game, they didn't kick your ass since first 2-3mins.