While it is true that the soviets seem to have more possibilities for
potential squad wipes, many here seem to forget that the German units on average do more damage than their Soviet counterparts. This in conjunction with the fact that the non doctrinal infantry of the Soviets is rather vulnerable has the effect that killing off squads with "conventional" methods works much better for the German faction.
One such example are PGs. I regularly kill conscripts squads with 2 of them before the soviet player even can react and if he manages to hit the retreat button you can still follow them and finish them off in many cases.
Mines are rather unreliable for squad wipes and it's been a while since I last managed to lose any squad or be able to kill one for that matter. Many lose their squads because they walk through choke points with low health squads expecting to get away with disabling mines with grens
.
Shock grenades, listed in the introduction, are the worst grenade in the game in my opinion. Bundled and Guard grenades (and much less likely rifle grenades) are far more efficient.
I also don't see the problem with precision strike, at least not the one on the 82mm. The 120mm precision strike might be worth looking into. However, many here also forget the higher firing rate of the German mortar and that it is also capable of squad wipes, although it's not as likely as with a precision strike. That being said, a precision strike is only as lethal as the German player let's it be.
Last but not least one must not forget how the game is designed. Both factions are designed to be asymmetrical. The Soviet faction is as a whole (or should be) rather good at fighting infantry to delay or try to prevent a strong German late game, while the Germans have the best at capabilities with some ai on top of it.
That's how the game is intended to work and how it should work. If we were to remove the chance of one hit squad wipes for the Soviet faction (which are not as often as people make them: attribution bias), we have to maintain the mechanic that is governing the two factions. This might mean making certain units stronger vs infantry to compensate and maintain the ability of the Soviets to drain the Germans mp to delay the late game. Whether or not this is better is debatable, since the one hit squad wipe chance can be mitigated by clever play (using mine sweepers, not leaving an mg in the exact same spot, dodging nades (problematic due to unit delays and input lag, which Relic should resolve)).
To dismiss railway and sector arty as late game partially invalidates your own list, listing the is2 and isu (I've recently had a 2v2 against it and it managed to miss more than in hit, flanked it with a p4 and it was gone
). I personally like to use the light artillery barrage and stuka bomber (both not mentioned) and had several squad wipes with them (the light artillery in most cases doesn't kill squads with one shell but it often gets the rest with another). The fragment bomb also wipes squads.