Just As its written in the title,here are some suggestions for the game:
1-trading dragons between members of the clan.(many people wanted this feature To be added).
2-co-leader,because sometimes the leader has some stuff to take care of and he needs someone else to take the lead temporarely.
3-pinning messages will be a good idea especially for the clans with no discord.
4-free alpha battle mode with no energy,just to test some teams out and see how it goes and figure out a plan.
5-adding a new duty characters specifically for clans,and his duties are related to the alpha,(for example:battle the alpha 4 times and such things).
6-getting a 2* dragon after beating a stage in the story mode instead of getting a 1*.
7-just for fun,choosing which one of your dragons to fly around your berk.
8-increasing the spots in the clan and make it like 30 players,so we can get more powerful and active players to join us.