I think you could probably make a case for only carrying out the Eben Emael attack - as a gliderborne coup-de-main it's very different from the other airborne attacks. Problem is without them the Dutch probably get the chance to blow the bridges in time and retreat behind the Water Line (things were touch-and-go as it was), meaning that Fortress Holland stays under Dutch control, quite possibly for the duration.
The RN were certainly capable of fighting convoys through to Rotterdam (they would be under land-based, radar-directed fighter cover the entire way), and the Water Line was designed so that it would neutralize the Panzers completely. That has all sorts of nasty butterflies for the Germans - not least the British having a bridgehead across the Rhine only a few miles from one of the biggest ports in the world, undamaged and in friendly hands. The only benefit is that you've got a few more paratroopers available to drop on Kent.