Whats the big deal, I can still object when developers ask for planning permission?
This to a limited extent is true. It is also what planners have been telling people at their core strategy road-shows. However, a planning application for development following the core strategy policy will be difficult if not impossible to successfully oppose. So yes, you can still object when it comes to a planning application, but unless you have a sound planning reason that outweighs the evidence base in the core strategy, you should save pen and paper.