RE: Hive Chain? I Might Love It, Here's My Wishlist... (this is a long one, but an important one)
HoneyComb || an easy-to-use sidechain sdk to support quick dapp development
HoneyComb is a simple "plug-and-use" modular SDK to enable anyone to quickly create custom sidechains for their dapps. Graphene's current activity index is pretty good, and we are able to handle quite a lot of transactions a second. But if we ever want to go super-mainstream, and on-board millions of users, we will no doubt need more scaling options. Popular dapps being able to spin-off & run their own sidechains ( much like Steem-Engine ), would be my best bet on how to most efficiently achieve this.