Straight forward question. I have been looking for a decent in-depth sub guide lately but couldn't find any. I have found some guildes on discord channel but it was for all specs and not in depth for Sub especially. Also any tuber or streamer with PvE Sub spec focus would be appreciated. All I could find was pvp'ers, which does not interest me.
I don't know why sub become so unpopular. When you type in "7.1 subtlety rogue guide" in youtube, you get absolutely zero decent content. There are some videos but mostly done poorly and not informative enough.