HT thnx for answering.
my answer would be no. 1
But if this starts to behave strangely (ie 50 cal pintle guns are more effective than 75mm ap rounds) then it will need adjusting.
I would like for the GV model to 'behave' believably.If at all possible id like it to be highly accurate to how it really was BUT if this means that GVs become next to useless as a tool in the game then some concession is necessary.
So far my favourite suggestions are:
from tac concerning which guns should be able to penetrate armour. 50cals,(non AP)20mm or 30mm should not peirce the armour protection IF its there.
Aircraft historically used as anti tank planes(ie iL2 or ju87 with 37mm,hurricane with 40mm etc) should be more of a threat and therefore more of a temptation to use FOR THIS JOB

Open topped vehicles should be easy to knock out (as they would be in real life right?).In the case of the ostwind the gunners should be vulnerable but not the driver or gunner in the protected main body of the tank.
If the shots come in from an angle where armour would protect them then let the shots fail to kill.Its only fair that some skill be needed to take out vehicles.
As to the ease with which GVs are spotted heres what i think would be an excellent idea if its possible.
We all know the 'black dot' is very easy to spot and in an aircraft the final part of an attack on GVs is very easy due to the icon range finder so i would request that GV icons be removed for aircraft all together.
Could we have the long distance dot removed also? if possible i think this should also be done.
What we then have is the ability to sneak in vehicles which is sorely missing at the moment.
However, tracked vehicles moving fast should produce dust clouds that CAN be spotted from a reasonable distance.
This would mean if you move fast as you near enemy bases you can be seen but if you plot yourself up in a forest or near some trees you become very hard to spot.
My personal opinion at the moment is that whilst vehicles are so vulnerable to almost any gun they are going to be looked at as the most unrealistic aspect to AH and therefore spoil the whole point of AH which is claimed as an accurate simulation.
(a good example of this was when i used the 50 cal(30 cal??) on an M3 to knock out a ostwinds engine from extreme range. the bullets were spread all around the ostwind with one or 2 flashes of hits and bingo there goes his engine) Good for me but absolutely frustrating for the other player.
Basically no concession should damage or impair the enjoyment of other players.
We dont need super pintle guns : pilots are then frustrated at the ease with which they die
We dont need small calibre fire from aircraft killing tanks : this leads to frustration on the tank drivers side
We dont need super armour either : all we need is an acceptable death ie killed by rockets,bombs or guns designed for the job and used skillfully.
we need to allow what ever model we choose , be it aircraft or ground vehicle, to have their real abilities. Ground attack being more stealthy,tank buster planes better for the job, bombers that may be less accurate but can plaster the area with more bombs.
fast vehicles like m8's that had low profiles and were camoflaged should be able, upon spotting an aircraft, slow to a stop, duck into trees and become HARD to spot.
its really a matter of making us all feel our deaths in whatever we choose to fly/drive is an acceptable one and matches the things we all love to read about.Thats where the immersion comes from and thats when the fun starts.