Because you cast whatever creatures Azula swipes, you don't need to worry about giving it back if your opponent removes Azula like you would with Mind Control variants, and the enters ability means your opponents are always two-for-one'd at best
As more and more creatures with enter the battlefield effects, low costed high toughness, or mana taxing abilities have been printed, the one-for-one trade that Lightning Bolt offers has become less and less appealing
You have plenty of options to bounce both the Goat and Rabbit into your hand, and youll have to leverage the means at your disposal most strategically to gain either the lore or cards you need to ensure victory over your opponent
These are all things that synergize with greens general strategies, so you arent stuck building an elf deck if you want it as your commander
When I select these cards, I try to appeal to the most deck where they could fit as a requirement to make the list, among other criteria I arbitrarily and capriciously decide on