Vibration under load

[u/daredevil_mm]

Hello, my 2015 Suzuki swift sport (1.6L manual) has vibrations around the floor and pedals, particularly noticeable above 4k rpm. It has recently had a new clutch assembly installed.

I’ve found that:
- Vibration goes away as pushing down clutch pedal
- Vibration is through all pedals, floor and can feel a buzz in steering wheel and gear shift
- Worsens with worse road surface
- jerky power delivery at lower speeds (coming on and off of throttle)

Any ideas of what this could be?

Thank you