In an ideal PT Maul shouldn’t have used light sabers either and Dooku shouldn’t have used force lightning.
The way it is now is so inconsistent with the OT. Vader and Dooku are fallen Yedi. Why would Dooku be able to use force lightning when Vader obviously couldn’t in the OT (and RO)? Despite the facts that there was more time between the PT and the OT than between TPM and AOTC and Vader beeing the chosen one and Dooku not.
In the books this is explained by saying Vader can’t do lightning because it requires organic hands. I don’t care about the books much I read them all once and thought it was a valid explanation.