Nevermind, the person who did that run, submitted it wrong and it was really a dh not a warrior, so maybe 15 minutes is fast for a warrior too
but that said, I’ve heard that you’ll be able to send soul ash to your other characters, so if you want fast easy soul ash, may be time to roll that demon hunter you never wanted.
And that was the last time I ever made that mistake!
Don’t you worry. It will very likely be overtuned and buggy @ launch in 9.1 so you can fail as much as your hearts desire. 
In any case it’s a non-issue. Players could refuse to take powers, use consumables, or just gear down to make the content , TC, more challenging.