This may open a can of worms..,,or guts as it were, .but I believe some people view the DA fites as "sterile".
In other words, you start out so even, and CO -E you end up with a "surgically" clean fite. And those surgeons who have spent a lot of time in a sterile environment have a decided edge from the get go... they know how long they can be in BO for, they know how to counter each and every modified merge, etc... etc...
The only way to become "good" at a DA is to go in and do it, time after time until you learn to be precise in the DA environment.
Some people prefer the Texas Chainsaw Massacre scenario in the MA, when you present them with the opportunity to go into the surgery room, they decline because they are wielding a chainsaw, and you have a scalple.
As a side note, I would recommend people go into the DA and learn, because from time to time, in the MAssacre Arena, you will find yourself in a DA like fite.
Balsy