I remember reading an article a while ago detailing how the network could work transactions faster if some value was changed, but Chinese farmers refused to change the value for whatever reason and because they represent such a large share of the network the whole network is stuck with those sub-optimal values.

It's already possible to fully "track/monitor" (without centralization) because all transactions are recorded permanently in the blockchain.

As to "censor" it would not be possible even if Bitcoin was mostly centralized (I assume you are talking about miners centralization). As long as some miners are honest, even if it's a small fraction, your transactions that others attempt to censor will still eventually be confirmed, whenever these honest miners find a block, because given the P2P nature of the Bitcoin protocol, all transactions can reach all nodes.