1) low fees
2) high hashrate
3) lack of centralization
I don't see how they are going to get all of these at the same time in the future. Pick one but you can't pick all three. Maybe you can't even pick two.
As i can understand it right from time, this has already been achieved and conquered and still remains the same as it was, there is no compromise with the bitcoin network, all we see and why we maintain the use of it is because of its decentralization, and there is nothing to change that, though you have at least have some point over the fee rates in making transactions, but they are not fixed, we have the mempool congested and the fee goes by order of priority with high fees and when less congested everyone have same opportunity at the same time, so nothing changed about bitcoin, while the future still remained secured.
Ser, the problem IS actually how could the fees support the security of the network if miners' earnings in fees are not consistent. Peter Todd proposed a solution, and it's ABSOLUTELY not going to make many Bitcoin HODLers very happy. BUT I believe if it's a matter of life or death for Bitcoin, it will be changed. It will probably be another hash war, and the community might understand the miners' debate. I hope the Core Developers will be there as the stewards of the hard fork though, and also remain as the stewards of the network.