I noticed that the subclasses choices for Spellcasters in the 2024 PHB follow certain patterns and themes, and that may explain some of the odd choices.
Druid is obvious: Land, Sea, Moon, and Stars.
Clockwork Soul sorcery is the counterpoint to Wild Magic sorcery--chaos and order (probably why Clockwork Soul was chosen, even though it seems rather niche).
Wizards have offensive magic, defensive magic, truth magic, and deceit magic, to make for a neat symmetry of subclasses.
Cleric has a dynamic similar to the Wizard's.
Fey Wanderer and Gloomstalker are also in opposition.
I think it's neat.