The gate in Drum Leveler is really good but there is room for improvement imo:
Make it 2-band. Have the upper band/high-frequency cut faster to allow the transient but cut the cymbal bleed while have the low-band/low frequency cut slower to allow the resonance to live longer.
Several gates like DeBleeder and Gatey Watey allready have this and it works really well. Would love to see this in Drum Leveler too.