why can't wargaming introduce +1/-1 matchmaking

The_Chieftain: This is a global game, and so has to be configured to work on a global basis. I'm going to go back many years for this post.   Those of us who have been around a long time will remember the +/-4 which was mentioned a few posts back. The reason it was changed was that there was a delegation from the NA office in Minsk (I was there for the presentation), mainly pushed by Jinxx and General Direction, if you remember them, saying in a nutshell that if Minsk wanted WoT to be more successful in the US, they needed to reduce the spread. The problem is that what makes an American player play a game is not necessarily what makes an Eastern European, or an Asian, or a South American play it. It may be hard for some to accept, but most players globally seem to prefer a wider spread. At least, they did a few years ago.   The example given was a PzIIIA with its 37mm gun tootling around a corner and encountering a KV-2, possibly with a 152mm, probably the 107. You can imagine what happens next. Plink...plink....plink...plink... SPLAT! The typical reaction to this in the US is that the Pz III player is going to say "That was utterly unfair. I had no chance at all. This game sucks". However, someone in another geographic area may react by saying "I bet he enjoyed doing that to me. I'm going to get me one of them, and go make other folks miserable with my superior tank!" and when he does get that tank, the pleasure of splatting other people outweighs the misery of being splatted in his overall gaming experience.   The compromise which was reached was that the MM spread would be reduced to +/-2, as it currently is. (+/-3 was also considered). Will we stay that way forever? I have absolutely no clue. That is a development decision, not my department. However, tanks were designed back in those days to be capable of surviving in a team against even high tiered vehicles. Hence the existence of what were known as the giant-killers, such as the old T-34/100, or the aforementioned KV-2/107. There weren't too many of them, but they had to be rebalanced or else they would be ridiculously OP in the reduced MM tier spread which was coming. So, if you go back over the patch notes for that period of time, you'll see that there were several patches which reduced the capabilities of a number of vehicles against higher-tier vehicles, followed by the MM spread change. That was for a smaller number of vehicles. It occurs to me that most tanks are/were designed to be capable of fighting in the +/-2 environment, and there would be a whole lot more vehicles which would have to be changed than just the few giant-killers of several years back.   As mentioned before, for more information on this subject as a whole, go back over the various dev diaries or releases. The matchmaker tier spread is something which has been talked about for years, it's not as if the devs haven't addressed the thinking behind it before.