G’day fellow Hunters!
Just had a crack at the 11.2 PTR and found an amusing interaction (though I’m sure it won’t make it to 11.2 launch day.
Transfer a MM hunter over with the current S2 4-set bonus over to the PTR server and make sure it’s talented into Precision Detonation and Shrapnel Shot talents (right side of the tree).
Then head over to some target dummies, cast Explosive Shot once and then move into your true one-button Marksmanship rotation of Aimed Shot spam.
The combination of the talents and the 4-set bonus leads to a never-ending cycle of Explosive Shot causing Lock and Load procs, which triggers 300% Explosive Shot detonations, which triggers Lock and Load procs, which triggers…
Well, you get the idea.
Blizzard has given MM a true one-button rotation!
Enjoy it while it lasts 
.