Putting consideration of regulatory requirements to one side, I would expect the prudent company to provide emergency missed approach procedures (where appropriate) in the same way that EOI takeoff procedures are published.
Simple matter of corporate risk management and sensible governance. The opposing counsel at the Enquiry is very practiced in making the target in the box look a right idiot if the i's were not dotted and the t's not crossed in a defensible manner ...
Using the takeoff procedure is better than blindly applying power and pitching up. However, one needs to consider - at the very least -
(a) the relative position of the MAP and the runway BR point
(b) distance/gradient capability for the acceleration to the missed approach configuration, as appropriate
(c) initial tracking errors and how one might address the effect on the takeoff trapezoid - remembering that big, rocky bits might be just outside the trapezoid.