The real truth about mods...
The percentage of players who actually *create* mods is far less than 1%.
The percentage of player who will actually use a mod that was created by someone is a tiny percent as well.
The majority of players never use a hero planner or look up stats or debate the build on the forums. Most players never come to the forums. It's just a game. They pay their monthly fee, and the play the game.
Even the players who do/did use mods...how many of them would actually quit the game over the looping sounds issue? Not many. People talk a big talk, but very, very few follow through.
However, mods are a customer support nightmare. Now the original, less than 1%, of players who could actually create their own mods are fine, but the other players who downloaded them are still a liability. If a patch makes it so that all the modded clients crash on startup, people are going to be unhappy. It might be a small percent, but it will be a very vocal percent. If the modding community has enough members and enough interest, the more they know about the innerworkings of the game, the more likely it is that people will write mods that go beyond harmless happy animations or sounds into the relam of complete hacking/botting. Then you've got legit players upset that everyone else seems to be botting their way to 50, then you've got people getting upset because they spent $25 dollars for a bot that turned out to be a scam, then you've got bots being downloaded from BT that are infected with kegloggers and plenty of non-technical people getting screwed.
So, you can either say 'No modding' and have a few people complain but ultimately do nothing...or you can say 'Go ahead and mod' and bring on the possibility of a lot of headaches.
