They still could have Deus ex Machina'd us into the same timeline. Heck, I could actually see the Storm Guard (or whatever they're called) as being the plot device that saves the warhammer world, without the need to reset it. Doing so would have given them freedom to write a age of puase where the races reconcile their loses and victories, allowing for dramatic changes in methodology and mindset, such as dwarfs being envigored to create more devastating technology above their holds in a showy display to deter evilforces from trying anything, the Empire to become more prosperous and stronger in unity, The elves to return to their island or unite under a single banner.
GW pulling a boardwipe and then saying everyone just went back to how they were before, plus this new factions of dudes who are OP as fuck, makes me feel like they couldn't muster the creativity to really capitalise on the world "Reset" they were doing.
I haven't looked at AoS in a while, and now I'm wondering if any of the Time of Ending stuff became unplayable due to being written out of the faction warscrolls. Which again would have been a interesting point to use for a better world reset.