KiCad EDA V6.0 Released

Generally speaking,Imo Mounting holes with no connectivity do not need to be on a schematic. A heatsink with no connectivity can be added to a schematic if you want it to be included in the BOM however. Sometimes how mechanical parts are used depends on your design process

On the subject of tear dropping, I had used this many years ago with allegro, I found snowballing was a better way of doing it vs tear dropping.