I'll start off by saying this is all just my opinion. The suggestions are just something I think will help make the server better.
This server has been nothing but fantastic so far. Everyone is nice, always someone there to help answer questions, the mods are on point and it's just nice to see a new community working so well so quickly. I do have a few suggestions though.
Aside from placing your chest in a claimed area, you have no protection on it. Maybe something like LWC can help out with this. You can lock chests, unlock them to the public, set passwords on them, set them to work for certain groups of people, etc... Pretty much every server I have played on has had it along with Core Protect so that am admin or mod with permissions can see what has been taken from the chest and when. It would keep everyone's items safe if they can't place a chest in a claimed area, or haven't claimed an area yet.
Towns. I understand the wanting to keep the game close to vanilla as possible, and I love that, but the only "town" we have now is Tropia. I have nothing against Tropia. It's a great place for beginner players to get some food if they need it, or even use the enchanting table if they haven't gotten the required materials for one yet. It's just that it's the only place like it. I know that everything is still fairly new, but unless you play for a while, you can't gain enough land to claim to create a town or you have to just create your own town with friends and just live next to each other and give each other perms to build. Towny could help this, but only if it was implemented in the right way. It would require an economy plugin though (I know that has been talked about). If you know some of the not so common commands for Towny, it can be a very useful plugin to create not just towns, but nations, capitols, allies/foes etc... It can also provide a money sink for the server to pull some excess money out of the economy by having a daily tax or upkeep cost for a town.
There's more, but this is already lengthy and I don't want to bore the crap out of anyone (plus I have to start getting ready for work). I'll add to this later and would love some comments about what I mentioned or even other suggestions.