Regarding the OP:
What is necessary? Good question. I will not relitigate the race discussion beyond what is relevant here.
If we have floating ASIs, no real suite of racial abilities is needed. If we also decouple standard cultures from races, this is doubly the case.
The need for big tough guy remains…and can be created with any race. This is triply the case if each race can be any size.
From a mechanical or lore standpoint, no race is really required. It would be more like life: the big guy down the street, “Walter” is the big bruiser and that he is “human” has nothing to do with that “archetype.”
I like all of the lore and mechanics to support your the idea of strong outsider. I might play him like one would expect or as a Paladin (I actually do like doing that).
For me, I would like the half orc to continue. But it’s not necessary if all of Tasha’s optional rules are in play.
Matter of taste!