A Bitcoin enthusiast with dedicated hardware and top tier home internet can't run a full node today without taking measures to cut down on the bandwidth. Increasing the amount of data that must be shared is obviously going to make it even more difficult to possibly downright impossible. I would say that is a huge step away from decentralization.

...And this is under the best possible conditions. What happens if/when some authority decides its time to try and prevent the flow of Bitcoin data (at an ISP level).

So, I'm a bit confused when you say that the value of Bitcoin is as a decentralized, P2P cash system, but it's OK if we move away from decentralization and have fewer peers. Wut?