I think there's opportunity to increase player immersion by implementing druidcraft and prestidigitation (and changing thaumaturgy to an extent) as cantrips that interact primarily through the environment.
All three interact with flames, so the ability to light/extinguish all light from small fires (candles, torches, campfires, etc) could provide tactical benefit.
All three create sensory effects, so should be able to act as minor illusion, with the penalty that you make a stealth check because of the verbal component.
Druidcraft and prestidigitation can create a small puff of wind, which I estimate should be
at least 10mph. Therefore it should interact with another druid spell, fog cloud. Rules as written, the effect would be minimal because druidcraft has a 5 cft limit and fog cloud has a 20ft radius. But still, I think it would translate well into game form if you're allowed to dispel/push part or all of the fog cloud for better environmental control.
Druidcraft and prestidigitation let you light small campfires, which in turn could allow characters to dip their weapons in for a damage buff.
As it stands Thaumaturgy grants advantages on intimidation and performance checks, which I think is overshadowed by the guidance cantrip. As such, I don't think there's many players using it currently. The above could make it appealing for players, and prevent druidcraft and prestidigitation from the same.
