Mongols are actually the ones who brought “normal” (counterweight) trebuchets to China. If anyone, it’s the Chinese who could have their trebs replaced with traction trebs, but I think people are probably opposed to even more gameplay changes to the Chinese after their rework alongside 3K.
I’d keep the Zamburak for Afghans. If Keshik becomes regional, how about disease catapults (whatever they’d be called)?: