In all my years of playing World of Warcraft, i've always hated the fact we have to go to external websites to get addons. Not only has the occasional virus or rootkit make it's way into said addons, but then the means in which they are supported have also constantly changed. CurseForge,TwitchAPP, WoWInterface, TukUI etc.
Today it finally occured to me...why on earth hasn't Blizzard just made an official BattleNET addon manger? This way addons would all have to be manually screened to make sure they're safe on top of having one secure spot to get them instead of several that we have now.