Speak with Animals always prepared seems like such low hanging fruit I am surprised it wasn't added earlier. A great easy addition that won't change overall combat power but is quintessential druid
Being able to change the spell lists each day really lends itself well to Circle of the Land as the nature wizard role. It gives it tons of flexibility and some great non-primal spells like fireball and misty step.
This is my outlook on prestidigitation, thaumaturgy, and druidcraft.
To me they smack more of narrative abilities rather than functional ones and I both give them to my players for free and ask for them for free in games I play in.