120's are real nice until you're foot slogging infantry and have to carry one and the ammo for it. At which point it ceases to be a company fire support asset immediately. The 8cm-ish mortar fell out of favor as more and more mechanization entered the equation. With less and less mechanization in the equation in T2K the 81s and 82s will make a comeback, particularly when you also figure in that that it takes less explosive, metal, and such to make ammo for one of them than for a 120 or 4.2" mortar.
I personally see the standard 82mm making a comeback -- for the above reasons and because they'll be a lot more forgiving of poor quality control than a Vasilek. I'd also expect that a lot of Soviet units that saw time on the Chinese front might have acquired captured Chinese 82mm mortars and put them to use here and there.
(But then I always like to confuse PCs with odd bits of Chinese kit that Russian and other WP veterans had hauled back from the Eastern Front . . .)
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