Just my preference, but for midi, I would simply use the TRIM tool(in GRID mode) to trim the clips for "house cleaning", but I would not dig too deeply as it serves no purpose(to me). The "Strip Silence" function(to me) is about removing low-level noise in audio tracks, and midi/instrument tracks have no noise to worry about. My other preference is to set midi/instrument tracks to show notes(except when I need to copy/paste clips)
