I can't say to other people what is important and what isn't, everyone has their own preferences.
What i would like to see however is some balance in it all. Nitpicking members and rivet coutners are a valuable resource, believe it or not. They will spot the mistakes first and they will campaign to get them fixed. They should be allowed to say their piece. On the other hand, i don't expect small details to take precedence over bigger ones.
For example, i too saw the duplicated serial numbers on the guns, it's hard to miss since it's stamped on such a prominent part of the gun. However, this won't break the game for me. What would break the game then?
Well, if we only had 4 flyable aircraft and less than 10 in total, that would break the game because they would be insufficient to render the battle of Britain accurately, but luckily we'll be getting more than 10 flyables and who knows how much more AI.
If we didn't have ground units to populate the environment, that would break the game for me because the game's world would be lifeless. However, for months and years during past development updates all we saw was ground vehicles, flak batteries, sound spotting stations and ships. The game world seems to be bursting at the seams with "supporting actors". So, no harm done there either.
If we didn't have an evolution and a step-up from IL2 in FM, DM, aircraft systems modelling and support for the interfaces to control them, i would be seriously disappointed. But, we've been told we're getting all of that, so this is also covered.
What about the small details then? I won't lie, i'd like to see every little bit. It's just that it won't ruin the experience for me if the trim tabs are a bit bigger or the serial numbers on the guns are all the same. I still consider them very important details, just not game breaking. That doesn't mean i don't welcome it when people spot the small mistakes here and there.
I think the best course of action would be to separate our requests into categories. If the guns don't fire under the player's control then we have a top priority issue. If they work fine, are modelled correctly and they only need a few details to touch up, it's something that can be done in a patch.
In any case, it seems like it won't be too long until this baby hits the shelves, so we're about to get hands-on experience at last.
Oh boy, that's when the real whining will commence:
"My plane handles so weird compared to IL2, i wanted more realism but now i can't fly, where does all this torque come from?"
"My engine keeps quitting, what did i do wrong?"
"My guns won't fire when i fly at high altitudes, what's wrong with them?"
Not to mention the FM debates...sometimes i feel sorry for the development team