Currencies' value lies in their usefulness as a means of exchange. Cheaper operation of the network and faster verification of transactions make for a better currency.
And the more powerful Ethereum-like blockchains that remain on a Proof of Work system are too expensive to perform their most interesting possible duties. Cost and speed improvements are essential for making the next leap forward.
It makes absolutely zero sense to bend to holders' "I must have a guaranteed deflationary asset, or I will complain to all my libertarian friends" desires. There are so many more important things to do with blockchain tech, including more globally important ways to create wealth.
EDIT: "You" is not the parent thread. I'm just expanding on what the parent said.