The shop we currently have are missing some blocks and crops for farming. For example pumpkins are not in the shop right now Mob heads should be added to the mob drops section of the shop for decoration purposes or others A crucial part of factions is trading with other players and /trade will ease the process of trading /fly is sort of OP right now on factions and I have seen multiple players complain that /fly is OP while PvPing such as when players are at /ffa people who have purchased /fly can just escape when they leave combat but players who don't have the fly on the server have to wait to teleport to a warp to be safe. My porposal is that /fly will only work in wilderness,your claims, and your allies' claims. In neutral factions' land claims you may not fly.
I have to agree about the shop I've seen quite a few people ask about Vines, Quartz, ect. Also having the ability to sell heads would be a nice feature as well. With /fly I would think just disabling it in warzone would be sufficient to satisfy everyone.
I think adding Pumpkins would be amazing! (and Watermelon). You know how mob heads can stack differently, that is like the problem with Gunpowder we had before but with this we can't change (it makes it unable to sell in shop). /Fly is just as long as tp'ing out of the arena, and people should be bringing bows anyway to shoot 'em down and if I am correct that how it was for a while but then it was later changed (the claim stuff). /Trade would be amazing I think but there are things that go wrong with it, I have seen many glitches for "Rip off's" involving /Trade. In the end I don't think /Trade would be a great idea to add.