Sorry guys that I´m messing in here, just want to add something to your debate about rules. I mean, I´m a fan of alternative fire rules, but as RickyB said, not every game is made for them, in some of them, they would do more bad than good.
Marcin, about Kharkov´42, yes, it was a disaster for them in real as well, but before it was, the Soviets gained some ground, but I believe that with Alt. Fire Rules such a thing as pushing those Germans back before their counterattack from the south is strictly impossible!
Mostly, in my games I only use Alt. Assault Resolution, but ONLY if it´s Volcano Man´s update as the stock scenarios were not created with that rule in mind, at least from what I know. And the second Alt. rule I like to use, it´s something like a small compromise, is Alt. Air Assault/Fire Resolution, I´m not sure which of those two words is there.
Good luck in your game guys, enjoy it!