Satoshi was advocating that the network in order to scale needs to increase the block size.
As ETFBitcoin pointed out, it is more appropriate to calculate block size in weight units rather than the 1MB limit. I don't think you seem to have read the discussions present in
[PATCH] increase block size limit in a proper way. Satoshi never said of an immediate change like how BCASH was implemented but rather a slow change which is being currently carried out. If you are willing to code a client with larger block size you can very well go ahead with your code and probably you might be the only one using the new client.
Some people tell it's better to pay high transaction fees and use a network with a larger amount of running nodes that pay less fees on a network with a smaller amount of nodes. In both cases, the decentralization of network remains the same, there is no administrator in both cases.
This is quite not true. Decentralization doesn't rely on having a administrator rather they are dependent on core users trying to change the protocol. Here bitcoin relies on large number of nodes which broadcasts the transaction and we don't need to depend on few nodes. What if the elite groups running the expensive nodes isn't trustworthy? What if the elite groups try to manipulate the network? This isn't going by the name of decentralization!
Why users should pay more transaction fees, and make the usage of network less attractive, while nodes / miners can spend more money to buy a larger storage and support a greater amount of transactions with benefit, collecting fees by more confirmed transactions with low fees, instead of confirming less transactions with higher fees? When both internet speed and hard drive storage is much higher today in 2020 comparing to 2010.
As I have already said above, decentralization exists only when there is a larger amount of full nodes controlling the network and it doesn't rely on administrator. The fact is that, every ordinary individual can contribute and control the network by just spending 200GB of hard disk space, but if the nodes which consist of large blocks are controlled by certain limited set of centralized users then the whole point of decentralization is destroyed here.