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.