Let me say first: the new instrument filters are simply awesome, I love them, I feel them all useful and funny.
That said i really miss the old digital filter for a single reason, it was normalized at dc.
The new filters are awesome but each of the low pass decreases the bass as the resonance increases.
Moogish filters are very common among plugins while normalized, ms20 style filters are less common and I was really happy renoise implemented natively.
Please put back a dc normalized filter!