Some jet transports can only manage 400 ft per minute rate of climb with an engine failure at V1 at take off performance limited by maximum second segment weight limitations. So the PA44 is not that bad after all in a single engine go-around providing the flaps and landing gear are promptly retracted after full throttle on the live engine. And the zero thrust setting on the `dead` engine is correctly set.
Zero thrust on light twins is not always easy to set because it varies and any variance from the correct setting at the time could either give you an optimistic rate of climb or no climb at all. Few POH state the combination of RPM and manifold pressure setting for zero thrust which means it is a matter of guesswork - such as "my instructor told me'