If you end up liking the class variants in they're next release I'd just recommend finding it online and ripping the pages you want off a download as it's most likely going to be sandwiched between a bunch of reprint material or just flat out bland stuff.
After looking at the Theros release that's how I'm going about it in the future. Some of the ideas in Theros are good but what they presented was really boring and bland. Any DM could take what they came up with the piety system and twist it to something better.
Even third party creations are better as Odyssey of the Dragonlords just offered so much more. Like Theros didn't even have stat blocks for Titans from their own lore while Odyssey did that plus so much more on top.
Thetrove is my friend. Its insane that the book didn't have stats for Titans. There was abunch of creatures that didn't get stats that were cool. The Archons mounts did not followel proper design for 5e Celestials, qhich is that ones that are CR 4 and 5 are supposed to have more then the usual utility spells to make sense if a Cleric summons one with the Conjure Celestial Spell.
They missed the second largest Akrosian city, one that appeared in one of the short stories.
Is it just me or Leonin not fit into the setting like at all? They aren't from Greek myth, or even inspired in a loose way, which is fine, but they don't fit into the religious nature of the setting.
They missed the opportunity to expand the setting to include the Archons homeland in detail.
Honestly as someone who regularly prays to Greek Gods, especially Hephaestus, often in RL, there is something frustrating about these settings, I keep thinking that I could do them better. Like why the fuck are Nymphs and Satyrs Fey, they should be celestials. I know in D&D they are fey, in Greek myth celestials make more sense.
There is so much more to ancient Greek religion then deity soap opera.
Honestly the religion in Theros feels like warmed over Forgotten Realms religion, but
with less impressive Gods.
There still remains the question of how Theros and Ravnica fit intonthe D&D cosmology.