I suspect you will need to analyse the statistics to see just how often that very long range capability was needed since 2015 - perhaps you don't need so many big helos and could concentrate the smaller ones with better hover performance where they are needed.
There has of course been a bit of that going on already. That's why there are two AW189 bases (and previously two AW139 bases) on the south coast near large numbers of coastal and near-coastal jobs and three S-92 bases in the northern and western extremities adjacent to large expanses of ocean within our SRR. However, the more diverse the nature of the fleet is made to address the different needs the more often the right aircraft will not be in the right place at the right time.