Perhaps pilots have too many options these days.
Harking back to the B737-200 we knew that ALL Go Arounds had to be manually flown also with no autothrottle (well on all the ones I flew) and a very basic flight director. Flying a manual Go Around was all part and parcel of the job.
Now we have the option for Auto Go Around (a la Cat 2/3 and both autopilots engaged), manually flown Go Around but with Autothrottle (with variation in one click/two click etc), manually flown Go Around with manual throttle or even auto go around with manual throttle - all with a more "sophisticated" Flight Director.
So maybe pilots are faced with choice overload?
A totally manual Go Around with no Flight Director (raw data) is from a handling point of view quite simple - power up to circa 90% (but don't look at N1 guages since a) correct thrust lever movement should be known and b) PNF should set accurately, simultaneously selecting 15 deg NU and trimming as we go - obviously we need to configure etc but fundamentally this is all we need to do to get the a/c climbing away from the ground safely.
Am assuming all engines operative of course.