How farming changes depends on how much food you want produced in the UK, we could have no food production and have the whole of the UK wilderness. I don’t think too many of us would want that so there has to be a balance, some areas for food others for habitat.
I live in a semi rural area, farms, fields, woodland, hedgerows we have a wide range of farmland and garden animals and birds. My only comment is, we would have a lot more if there were less predators, Magpies, Crows, Birds of Prey, Badgers, foxes and domestic cats.
Farms are much tidier these days, grain and feed has to be kept in closed areas to comply with food hygiene and Farm Assured regulations, so there are less opportunities for birds feeding. Farms have been increasing the areas of habitat over the years and the new farm payments scheme will increase those areas.