[xsiv24]

Guys, could really use some help here as I'm quite a newbie to the B48.
I recently took ownership of a G20 320i (2.0litre B48 engine). It came with a M Performance exhaust, drop in filter (brand unsure) and a 200 CELL downpipe, running BM3. It also has a DTE Pedalbox which for reasons I will explain later, I set at Sports (-3) setting.

The problem I am facing is that the drivability at low speeds is almost impossible. I could just breathe on the accelerator pedal and the car jumps forward, making traffic jam style traffic almost unbearable. It's like wayyy too responsive. Deceleration at low speeds is also unbearably jerky.

The DTE at Sports(-3) seems to help a bit - Havent tried City mode though.

My questions:
1. I have a VSRF catless downpipe waiting to be installed. Will this help to reduce the backpressure?
2. Will a MST open-pod air filter make any difference?
3. Should i just remove the DTE pedalbox altogether and trust the hardware setup?

Any advise will be appreciated. Thank you so much.