I know they added the feature to manually downgrade it but hear me out.

1. When randomizing skins you can't select the downgraded version.

2. The downgraded version is simply better and i'm sure the whole community would agree.

3. I want the VFX glow that comes with the upgrade but the smooth flowing pull out of the level 1.

Thanks for reading.

TL;DR: Level 1 Prime Karambit is superior in all metrics.