Adding drills will take away a tactical element of hysteria, which is the teleporting underneath an opponent move (as MI mentioned). This is useful to try and move opponents away from hides and also stops them from teleporting to certain hides where they are susceptible to being fire punched.
Normally, when someone wants to make a change to a scheme, they give a list of reasons why; and perhaps even provide examples that argue for it's inclusion...
We're listening...?