Sacrificing the flavor of Gods to make all divine casters be nearly identical to one another is something I don't like about modern D&D. Sure, I know it's a pain when no two Clerics necessarily resemble each other, but Gods have become pretty much vestigial to D&D.
And I get there's a lot of reasons for that, some of them pretty good ones, but not being able to worship say, Auril the Frostmaiden and having, oh I don't know, a spell that inflicts cold damage, lol, is kind of ridiculous.
And sure, a given DM could put on their game designer hat and make a Winter Domain- but the fact that they have to do this on a case by case basis really makes the official settings feel half-baked.
The Forgotten Realms, which is lousy with gods, is a great example of this. You can have a popular deity like Tymora, Goddess of Luck, whose priests all have the Trickery Domain?
Eh? That's not what I'm expecting from the Luck Goddess. And why would the priests of the Luck Goddess have the same exact powers as the priests of Mask, God of Thieves? Let alone Sune, Lolth, or Asmodeus?