[Snake]

It should. Duelist is already very basic attack oriented, and this would help further enforce this feast or famine fighting style.

I think to compensate, Swords being used with Sidecut should get something extra, as well as Spears with Sillcut. Just a bonus effect to make them stand out from the homogenization.

Something like:
"If Sword weapon type, On-Critical: Sillcut's momentum becomes 0, and Repeat Action is reset. (3 rounds CD)" (Sidecut)
"If Polearm weapon type, On-Critical: Sidecut's momentum becomes 0, and Repeat Action is reset. (3 rounds CD)" (Sillcut)