Sound system and RP gain

so i just went through 10-12 games and for some reason the sound for enemy tanks are for some reason more quite then my own engine even though i have the setting for other player tanks to be louder then my own. is this a system glitch within that setting or is it still the game. if its still the game then its been over a year and nothing has been done XD.
also when are we getting the update to make researching tanks/planes less grindy? or has it already happened and gaijin just make the RP for tanks more. also dose it happen to be cause of just how many bot accounts there have been selling in 3rd party sights?