I have couple more suggestions I know you can't do trading in co-op but the castle on the island can you do something with the castle someone in our group suggested it would be cool to do something with the castle like explore inside, or do a trading Post inside the castle or do weekly task to that not part of the regretta to earn more coins because the higher you go the building cost to much for coins, find other ways. A member also mentioned like getting coins from community buildings because they just sit there get coins from them like every day or every 2 days some other ways to get coins, just some thoughts and suggestions, but it would be cool to see something we can do with the castle