With Wallaru on the horizon, it would be nice to see an expansion to gardening mechanics. Every world adds new reagents that are used for crafting gear or spells or whatever else, but what I'd like to see with Wallaru is some kind of gardening that enables you to craft the gear you want.
Most of the time mobs drop seeds that I either feed to my pet or quick sell, and I feel like this is wasted potential. Mobs could drop seeds that are related to the world itself, maybe a lower tier seed that you have to cultivate into a higher tier seed similar to some of the beastmoon seed mechanics. You could take the seed to a crafter in the world and use the world reagents to craft into a better, higher tier seed. Or simply through the process of gardening, the seed you get back at the end of gardening a seed could be either the same tier or a higher tier seed. The different teirs of seeds could be more challenging and more rewarding. Gardening these new seeds could give you more reagents, world themed pet snacks, furniture, the world's music scrolls, etc, until you can plant a plot of the highest tier that gives you some sort of penultimate reward, maybe even some of the boss drops.