Until they are hopefully banned, there should be a 50mph speed limit on them. It should also be optional (not mandatory) to use them, especially if there are at least 3 other lanes to use.
Maybe ban HGVs from using them, and let cars undertake on them.
Too many HGVs have run into broken down cars while on the 56mph limiter without even touching their brakes, resulting in instant death for the cars’ occupants.