It's still gonna be a while until Arena is planned for release so you could probably fit an update before then. But anyway, I think SoT needs another Quality of Life update, this time focused on 3 main aspects. Wildlife, Plant life and Sea life (Why is Wildlife a word but not Plantlife and Sealife?). I don't think there should be any Bilgerat adventures for it (unless you want to), as it is purely QoL.
Wildlife: Aim: to increase animal diversity on islands.
- Generate visible parrots and other birds instead of just hearing the annoying bird sounds. Birds: Parrots, Seagulls, Crows (Found in the Wilds), Rare Albatross, etc.
- introduce insects on islands. They don't have to be particularly good cause very few people are gonna look closely at them, but it would still be good just to have. It could also introduce spiderwebs and termite/ant mounds as features.
- Add other beach animals such as frogs and crabs.
- Add wilder, larger creatures, e.g. Wild Boars, Deer, Elks.
Plant Life: Aim: To increase Plant Diversity on islands to make them more realistic and visually appealing. - A wide variety of different flowers
- Elephant ear plants (I don't know what they're called but hopefully you know what i mean)
- Lilies and lilypads in ponds
- Vines crawling up trees
- Plants that can be cut for various types of fruit and vegetables.
Sea Life: Aim: to make the sea more vibrant and give incentive for players to explore underwater. - Introduce a wide variety of colorful tropical fish as well as creatures such as turtles, eels, seahorses, dolphins, etc. This could open up possibilities for a Fishing system of sorts.
- Expand coral reefs and fill them with different colorful corals.
- Add secret ruins underwater similar to those found on that island that I've forgotten the name of. These ruins could be filled with random treasures.
- Add clams on the sea floor which may contain pearls of varying size and value.
Anyway that's my idea. If you have any other concepts feel free to add them.