Some soil building, probably less than a cereal crop, it’s a good alternative crop in the eastern counties and neonicotinoids are allowed in certain areas, as they are allowed for rape crops.
The alternative insecticides are largely ineffective, effective chemicals that are allowed outside the EU were banned some years ago.
There has been a sharp decline of all insects in recent years, I get far fewer insects on my car windscreen than in the past and hardly any in the house. Something is going on, the blanket use of neonicotinoids on many crops including cereals is highly suspect, although nothing is proven. Yield of many crops has declined with more crop failures, it all contributes to higher food costs.
Now we are not bound to EU regulations some will change, more chemicals, possibly GM crops will be permitted allowing more pest resistant crops, wether the politics of that can be resolved is another matter.