The Ost mortar IMO has a perfect range and does maybe a bit too consistent damage, but this damage is needed for crowd control against Allied blobs, especially in team games. Additionally every Allied faction has at least one mortar that outranges the Ostheer one
- 120mm Sov mortar has more range + more damage + 6 men squads with the ability to survive with one man left (which is absolute BS). Though it is doctrinal and shoots slower.
- UKF mortar pit has more range + shoots twice + has brace + can't be stolen + Shoots faster with garrison bonus. Though it can't move obviously.
- USF mortar has more range (or same, don't know) + faster fire + better accuracy.
The only mortar that really is worse than the Ostheer one is the Russian BM41.
When playing as Axis, I am ready to sacrifice a squad of Volks/Grens in order to get a 120mm/USF mortar. Simply because currently they are kill farmers behind your lines without any big effort. It speaks for itself that currently you see about 3-4 mortars in 2v2 games per side simply because the killing and wiping potential of mortars is so huge atm.