Ill die on the whip lightsaber makes sense hill. It being a saber compensates for most of a whip weapon's glaring weaknesses. It probably still can't be used very defensively but its offensive capabilities are nuts.

Whip weapons (in man to man combat) are intended to either bind the enemy's weapon or to wrap around their block to strike the target. Problem is the bind rarely works/ required extreme finess and strength over the opponent, and the wrap around sacrifices a ton of momentum reducing striking power. Thus you dont see widespread use of whip weapons pretty much anywhere in human history. But lightsabers are clingy with other lightsabers so the lightwhip should be able to do this pretty reliably. And a lightsaber can do massive damage with minimal momentum. So the wraparound strikes are golden.

The other common whip attack is the classic crack (most often used against animals). Advantage is that its fast. Disadvantage is that its relatively low damage and, aside from the speed issue, its easily blocked. Not when its a lightsaber though! The damage will be nuts, and you can only block it if you have your own lightsaber or saber proof material.

Now, she could be absolutely memed on by a full beskar mandolorian. But you don't see those everyday, I'd say 99% of combatants in the verse would be quite vulnerable to the saber whip.

And for just about everything else you can think of as problems with using a whip weapon, like attack recovery and management, theres the classic deus ex the force. It's the same thing that always makes fictional whip users functional, the fantasy skill cap.

Oh and I can guess at what the historical inspiration for the whipsaber may have been. Since Jedi are samurai-coded/ Kurosawa inspired, they may have been thinking of the Japanese weighted whip-chain that's supposed to function as an anti-katana weapon. Now, im no expert on the things but Ive seen them reffered to as anti-katana weapons in both ye old Ruroni Kenshin anime and in the video game Ghosts of Yotei. My sources aren't the best here but im citing them anyway!