Godbound+Core/Modern D&D: Core Assumptions

Keep in mind that I refer to 'modern' D&D as the post-TSR, which is to say from 3e to 5e (plus Pathfinder) and as such the 'core D&D' which my generation is most familiar with as opposed to the older editions and versions of the game. The aim is to draw from fantasy from the '90 to the 2010 which people in the 18 to 30 years range are more familiar with rather than what actually inspired D&D.

Seriously, nobody* has read Conan, Elric or Three Hearts and Three Lions. It's a shame, for sure, but that's how it is. Nowadays people are more likely to know the Lord of the Rings movies than the actual 'Tolkien Legendarium'.

Core Assumptions from D&D: Accepted vs Rejected

There is a list of 'core assumptions' to D&D, which is generally taken from the core books of the aforementioned editions (plus Pathfinder). Some of these assumptions about the world are kept and even reinforced while a few are sacrificed for the sake of easing the mixture with Godbound rules and implied setting.

• The World is a Fantastic Place: The implied setting of most, if not all D&D worlds, is full of things which do not exist in our world. Accepted.
• The World is Ancient: There's an absurd amount of ancient complex, long-lost tombs and temples and magical artifact. Accepted.
• The Material Plane is not the only Plane: There's a ton of other dimensions out there, which seemingly only exist to host the gods, demons and weird creatures and maybe be used as high-level adventure locales. Accepted....mostly.
• Magic is commonplace: Magic is an accepted phenomena, almost like a sub-set of science at time and less something seen with superstition, fear and misunderstandings. Accepted....mostly.
• There are different forms of Magic: Not only is magic everywhere but it come in a staggering varieties, from Arcane magic to Divine Magic to psionics to other things.  Accepted....mostly.
• Spells are predefined, have levels and use Vancian casting: It's a common thing with D&D and a core part of how classes function. Rejected! Of sort. The Godbound are completely beyond Vancian-style casting but for mortal NPC it absolutely is how it works if they aren't using a form of Low Magic which has powers usable at any time.
• There are (too) many Sentient Races: Beside humans you have elves (all ten thousand variations of the damn things), dwarves, halflings, orcs, goblins, bullywug, ogre, centaur and a million other weird things in spite of how, on Earth, only Homo Sapiens remain. Accepted.
• Biology has little hold on fantasy: Human and elves can produce offsprings which are fertile. In fact, half-something are ridiculously common. While I do intend to tone down a lot of this, the possibility of 'magic did it' crossbreeding is entirely there. Accepted....mostly.
• The various races seemingly interact: Not only there are a lot of races, it's increasingly accepted that they intermingle socially, more being treated like ethnicity in a western metropolis than completely different life forms possibly sharing no recent common ancestor. Accepted....mostly.
• Society and technology is anachronistic: You have kings and knights, swords and bows and yet somehow there are many inventions which do not fit and mindsets which are anything but accurate to the middle ages. Accepted and there is a reason for it.
• Gods shaped the World: Absolutely, given that the game is called Godbound. However, there is going to be a major rework of the nature of the Gods and their history. Accepted.
• Gods are active (except when they are not): The gods of D&D are weird, as we are told they are active yet somehow they are also distant and mysterious entities who seem like every time they interact directly in the world it is either in the backstory or when the DM want to slap players into place. Rejected! There's going to be a major rework of how gods interact with the world, at least the pre-established 'backstory Gods'. The player character Godbound are an entirely different story.
• Gods are Good, Evil, Lawful and/or Chaotic: Also known as the dreaded 'alignment system' which has been a source of much debate. Rejected! While some Gods did act in ways we could assign an alignment to, they are not pure embodiment of alignments. Things will be a bit more complicated.
• There are god-like beings which are 'not proper Gods': Often the case for demon lords and their ilk which, through the game's history have constantly flip-flopped on whether they are proper gods or not, especially whenever they are allowed to have Clerics. Rejected! These beings are absolutely divine, just with a different context to the main gods worshiped by most mortal races. This also allow the existence of things like Parasite Gods and Made Gods. A 'god'-like being is anything which is bound to a Word and able to use it to enact Miracles and change the world.

*In that age group. Okay an exaggeration, but still...