Something I would like to see from the cryptocurrency space is some way for the block size to fluctuate with daily and weekly transaction volume. For example, you would expect that the transaction volume would be greater when it is daytime on the east coast, so the blocksize should adapt to those temporal changes as well.
If there is a certain latentcy/bandwidth/storage/decentralization tradeoff with block sizes, then we ought to design cryptocurrencies to make the most of this tradeoff with respect to predictable low/high demand.
Ethereum changes the cost to use the network based on recent block sizes, and allows the block size to go up during high demand. So it's cheaper to use the network when blocks are less full, and more expensive if blocks are mostly full. I'm behind on the current parameters, but they're essentially doing what you ask for:
If there is a certain latentcy/bandwidth/storage/decentralization tradeoff with block sizes, then we ought to design cryptocurrencies to make the most of this tradeoff with respect to predictable low/high demand.