for starters it sounds like, as a basic consequence of the Sill and The Architect you've;
A: forced all nobility to be either in possession of antimagic facilities and the means to eliminate wizards (so I'd suggest coming up with anti-magic materials so there's some means, if only as a failed remnant, to oppose casters by non casters.)
B: created a world wide magocracy with various magic fighting one another. Also that favor of the gods leads to strange but often effective favors.
so instead of venturing off to get a magic sword heroes return with antibiotics, nervegas, advanced metallurgy, flight technology, or esoteric applications of alchemy.
it sounds to me like while magic may exist industrialized use of various things is whats important.
Also your world is probably a major shithole in between the megacities, which should probably be full of pollution and garbage thrown out by the city dwellers so maybe nature spirits and gods are starting to take offence.