I haven't dropped speed work, but Project has.
Here's my thought on speed work: The MM style allows you to take advantage of speed on the downward part of the arc. According to MULE this is why you throw it back and walk your elbows under the bar. For those that press in a straight line, you don't have accelerating bar speed at lockout; therefore, I think it's necessary to train for speed when pressing in a straight line.
I also asked Mule if he ever trains for chaos recovery so that he can lock the bar out even if it's not going back like it should, and he said no. So many times, I will see them stall in a position that's SO close to a straight line lockout.
I'm not benching the next few weeks, but when I'm back at it I would like to try the full MM set up, but bench in a straight line. It's a shorter ROM, uses more speed (which I have and enjoy training for), and still allows me to use the arch and leg drive I have learned.