Probably the cheapest and best option is to build more wind and not care too much if it increases curtailment.
Yes, all the things mentioned should be looked into and done when it makes financial sense but "wasting wind" is much less a thing to worry about than "burning gas", and I'd rather waste wind than waste money.
The article wasn't decrying the existence of excess wind power, it was trying to describe the best solutions for using that power.
But all the solutions are aimed at reducing the curtailment of wind. Rather than reducing the gas burnt.
If the money saved by building more wind (or solar) and not having to burn gas saves more money then who cares if more wind is "wasted"?
It would be nice to use every last drop, but I dont want to actually spend money to achieve that goal when it could be used to e.g. build yet more wind, and burn even less gas.
The article is saying that if we built more transmission lines, or increased storage capacity, or had localized pricing, that more of the power generated would get used, and we wouldn't need to turn on the fossil-powered plants as much.
More wind wasted is precisely equal to more fossil fuel burnt right now.
Further, the article described why simply building more production doesn't solve things, because most of it would be built in Scotland, and we wouldn't be able to bring in any more power into the grid where it's needed then we do now.