This issue is not a few people. This issue is not new. This issue has been happening for far too long.
Download speeds under 50Kb/s or even sitting at 0b/s is unacceptable.
Oh how about a restart of the app, ok. oh its fix… nope back to slow speed.
How about do a DNS flush and do this and that… ITS A TEMPORARY FIX! Which may not even work.
If Pre-patch downloads can go full speed, current patch downloads can go full speed too.
The battle.net developers need to fix this issue, maybe you should ask Microsoft for help as it seems the battle.net developers are pretty useless on this issue. Its like they have just given up on it and just copy and paste links that DO NOT WORK or if they do, its only for a short period of time.
Try doing your jobs and fix the issues that people are having. Its not a new issue.