Originally Posted by -Ross Hunt
A) They mess with your technique, but also because
B) Since you're already stronger in those exercises, they do not offer you a lot of potential for developing strength or metcon qualities; even if you let form go out the window, you still don't get a great workout.
Good points. I do think that the more well-developed your lifting technique is, the more high-rep, fatigued-state training you can get away with without damage. The real problem is those with no technique to speak of continually training more shitty technique.
As far as not having much to offer at the lower weights, this may be true to an extent. The one thing they certainly offer is variety. Beyond this, how much they offer beyond other movements in the CF pool is questionable. But I don't see anything bad about training repeated explosive hip and leg extension in metCon sessions.