Again i think the whole issue is due to lack of creativity of the D&D 5e designers and running away from the good ideas of 4e.
For example, 5e took away the traditionalist history of half orcs being born of sexual assault of human by the always evil orcs. In it's place it offers little story. Half Orcs are the result of human and orc tribes or gangs cementing alliances via marriage. A half orc makes abetter chief than an orc due to their high intelligence.
Well isn't the intelligent orc, the orog?
And we aren't doing ability penalties. So what's the difference between orc and half orc now?
WOTC: IDK. Just pretend your orc had a human dad.
4e did half orc better offering new ways half-orcs could be seen.
- Half Orc are transformed humans doused by Gruumsh's blood when Corellon gouged out his eye.
- The hobgoblin empire had orc troops and magically created half orcs to lead them.
- Kord created half orcs own his own, copying the best elements of orcs and humans.
Beyond that Half Orcs were more agile whereas Orcs were tougher. Eveen through barbarians where in the same book Half Orcs appeared, they weren't linked to them. The suggested classes were fighter ranger, and rogue. The sample half orcs were rogue, warden, and ranger. Half Orcs were short tempered but they could read the situation and remain calm whereas an orc would fly off the handle.
5e just made Half Orc the Orc stand in and a +2 STR race.
With Orcs in the 2024 PHB and Racial ASI out,
WotC just dropped half orcs rather than create or reuse lore and mechanics for them.