Some of the objectors might have more credibility if they refrained from referring to an airspace "grab". What is it that they do not understand about the operation of class D airspace and why does its establishment involve a waste of time and fuel?
I'm afraid their fears and objections are based on what has happened elsewhere. Far more CAS than necessary is 'grabbed', and then, despite assurances to the contrary, GA is excluded. They are then required to fly around the outside, thus wasting time, and fuel, and at the same time increasing risk of collision by funnelling them through the remaining narrow gaps. Once CAS is established, it can't be shifted, and the promised periodic reviews of it's operation almost never happen.
MJ