I would like to see the option to configure the starting items in chests and maybe even the material the island starts with. For example maybe adding a bedrock block in the center under the dirt.

Another reason is small servers or servers using cauldron and such might have animal spawn fixes and we don't want to start with things like eggs.

There is also Mob Bait from Compressium mod + Pam's Market and maybe other ways to obtain animals.