I think that's more than just optics, it's probably a contract issue too. Specifically, a likely clause in her contract that states if she gets let out her contract early (aka fired) she gets a hefty paycheck. So, if firing KK will make them look bad and cost them money, they're going to keep her until her contract runs out. Then they can simply not renew her contract and part ways, although she'll still probably collect a golden parachute.
Yeah that golden parachute is always going to be there once you get to that level. Well, we will see this year since 2021 is when her contract is going to end. It seems fans are putting their hopes in Filoni and Favreau but I really wonder what they can do. I really dont think an ST redo/reset is realistic despite the “veil of the force” from a lore or real world perspective
Lore
from my understanding of a video about it, its more like a 4th plane of existence outside time and space that the force user can travel through and go into, possibly altering events.
Time travel is always murky so assuming stable timeline, the ST did happen although offscreen deaths can be retconned. If the timeline is not stable, this can open a can of worms (also it seems the portals are for fixed points in time. Why these points? Or are there infinite portals?). Can obi wan go back to save Qui Gon (who would have been the better teacher for Anakin)? Anakin save his mom? Luke save his aunt and uncle? Could cheapen death which was a big factor and teacher in Star Wars.
Real world
This is going to be really hard to manage because of casual fans and the split in the fandom.
casual fans would have no idea about the veil and “oh a time travel retcon” maybe seen as a tired trope. It would also make fans confused (so which episode 7 is the real one i need to watch?). To be fair, in the age of youtube and the internet, a casual fan can just search explain this to me and can get 100 answers although it depends on if the casual does the search.
We also have to recognize that as unrealistic as it is from our perspective, there are fans of the ST and they will be pissed if the ST is rewritten/decanonized and will be poisoned against the new ST. It would be an uphill battle comparing the STs and further divisions if the new ST doesnt meet what the non-ST fans want.
I do think Star Wars on its current trajectory is pretty dead like the Terminator franchise (another one i like but pretty much let go). If the rumor of the reset is true, it gives me hope but i really dont think its as easy as people make it out to be.