Another pill:
PANS-OPS 3 approach charts were designed with an acceleration segment depicted in the missed approach procedure. If you happen to be flying one of those charts you can accelerate and clean the airplane as per the procedure. For the rest of approach plates that are PANS-OPS, there is no acceleration segment included, so if you level off and accelerate, you will be doing so without knowing exactly if you are hitting the ground clearance slope.
And, that ground clearance slope that you are required to maintain always, is calculated from the MDA or DA. If you do the go around below minimum, there is no approach gradient chart to check your perfomance with one engine, so you are required to follow the engine out procedure (even with all engines operating), to make sure that if you lose an engine you'll never hit the ground clearance slope.
There are airlines that require pilots to follow the engine out procedure when doing the go around above minimum and with all engines operating, if the OAT is above the flat rate temperature of the engine. The reasoning is that above that temperature, the engine doesn't produce TOGA thrust anymore even if the thrust levers are in TOGA (flat rated engines produce full TOGA thrust up to a certain OAT, after which the output thrust starts reducing) and therefore the performance doesn't comply with the requirements.
I believe all this is in the 8168 ICAO document.