Go back 20 years or so and the country had lots of separate low flying areas. There was a main route going round the country and link routes into the low flying areas.
Lots of nuisance etc for those living in each of the areas, main and link routes. The system changed to effectively cover the country with areas thus spreading the load and established OLF areas in sparsely populated areas.
Designate separate areas for heli type OLF flying and, apart from transit times, I wonder how long before the number of complaints rise in those areas requiring another shift of area?