When medicine and science fail, and the only way to get humanity back on track is to rewind the clock, a group of historians and storytellers sit down to rewrite history

It reminds me of the god awful movie Timeline.

So, revisionist history? That's SOP now. Don't see what's novel here.

I did not get the 'time travel' aspect from reading your logline.

From the logline it seemed like they were just re-writing history books like the communist do.
You might want to mention that they go back in time to change history.

"He who controls the present controls the past, he who controls the past controls the future."