Statistics Mod

I know grabbing "data from the player’s actual game client" isn't allowed when it comes to making third party mods/apps., but if the data was just being used for a record so the player can find areas to improvement in would it be fair? Somthing similar to what Dota 2 did with the compendium when it had the ability to track the EXP and Gold Earned in a given time frame for you favorite hero.

It doesn't bring much of advantage in-game. It just an awareness for players to keep track and self improve for later games.

It really doesn't make or break a game. It's just like have someone watching your stats and writing done every minute or so how much gold/exp your earn.