de facto....
de facto,
You've made the point precisely. "Either you have the performance for a missed approach, or you need a company escape route if required." Perfectly stated....
So, you take off, what is your V2? Oh, depends on your weight, among other things, you say....
And, during your go around, what is your speed? Oh, depends on your weight, among other things, you say....
411A flies three engines or more....not the same animal. Performance, performance requirements, regulations....all different.
Suggestion: On your next sim, try it. Have a look at an airport that has one of these procedures, along with an ILS missed approach with an abnormally high climb gradient. (Again, Hong Kong 07L is a good one, but may not be in your sim's data base.) Set the weather on Vmc....so you can see the hills. Set the temperature at typical. Set the landing weight at maximum, first, then typical landing weights in a second trial. Do the published missed approach, first, then do the engine failure on takeoff.
We did this a few years back...trying to remember the airport (It was a U.S. airport, but can't remember the specifics.) Did it in the MiniBus...four trials....one at max landing weight, one at typical landing weight, and each of those two with the standard missed approach procedure and the engine failure on takeoff.
Have a look....
Our trials confirmed that our comapny's SOP is correct. At max landing weight, warm temps, one engine inoperative, flying the standard MAP, we DID miss the hills, but we got a lot of "WHOOP WHOOP UP". Simply, we did not meet the non-standard missed approach climb gradient with one engine inoperative. Flying the engine failure on takeoff procedure was a piece of cake.
Fly safe,
PantLoad