Improvement for autocannon veichles and SPAAs should happen,as they are immediately outclassed when you get any tank with a cannon.below I will provide some suggestions to improve these so the starter experience is better.
Remove overheat
Overheat is really unnecessary when you have such limited magazines anyways,and ovwrheat dosn’t have any place in the game except for mounted (unlimited ammo) MGs,and even then it should be dramatically reduced from what it currently is.
Give autocannon veichles lead markers
So they can,in the rare chance of a low flying enemy plane,try to shoot it down with the autocannon.
improved shells
The penetration of such veichles lack severely to attempt to combat tanks,and should be given improved ammunition to better fight tanks.
-German 20mms get PzGr 40 HVAP-T instead of PzGr API-T,penetration stats increased from 37mms of pen to 48mms
-Russian 20mm gets API HV instead of API,increasing penetration from 27 to 32mms (it isn’t much but still an improvement)
-Italian 20mm trades half of the API T for PzGr 40 HVAP (keeps some API T because this at least has a little explosive filler)
-no alternate AP shell avalible for the japanese 20mm
decrease reload of the Italian 20mm
It has only 8 rounds,but the reload of a 20 round magazine.the reload should be decreased to balance this better.
decrease reload of the breda 8mm MG
A tank MG that has 26 rounds and takes about as long,if not longer,to reload then beltfed guns with 200+ rounds (ten times the magazine size).
move SPAAs and autocannon tanks to the rider class
Even with these improvements,normal cannoned tanks would probably still be better,due to much higher penetration,better armour,ect.Doing this will allow for normal tanks to be present,while SPAAs and autocannon veichles can offer some support,even if limited.