I have a somewhat slow internet (2MBs), but the real problem is that I have a really small data cap during the day.
I'm currently downloading the game (at night) but since I have a slow connection this will take a while.
I've reached the playable level in the download in the launcher, but even though I've paused the download, whenever I go in game, the background download goes back to full speed as soon as I hit the hero selection screen. Is there any way to stop it or limit it to only essential things instead of it resuming downloading everything in game?