Yet here is a feral who seems to get good results from what seems to me as fishing for Shadow Thrash:
https://www.warcraftlogs.com/reports/LJwxM13chWb6ykXn
Here is a feral using Brutal Slash:
https://www.warcraftlogs.com/reports/bRdaQGM7xmH3LN69
From what I can tell he is using the T100 talent Moment of Clarity which in combination with Thrash is generating what would seem some really high AoE numbers that might be superior to brutal slash, with the extra addition that Moment of Clarity is not useless on single target/bosses. If I look at the first 30 seconds of Purrowl's combat. He casts thrash 4 times and had no clearcasting procs yet has some insane shadow thrash damage. I need to test if Omen of Clarity works with thrash because 3 free thrashes to fish for shadow thrash seems sick.
Saw other ferals reporting on forums they seem to have higher output with this method as well. So don't dismiss it as "not the way to go".
Back it up with a log or explanation why this would not be a valid way to get high AoE numbers.