This vote was not pan-european, there were distincts votes not even referendum in 80% of the members states... These votes were made by parliamentaries which in their majority voted yes when (like forecast in France, Holland, Ireland, Germany... ) when people were in majority against!?
A Newropeans' request would have been to have a referendum the same day in all member states with the same question, YES or NO, as a treaty like enlargments are important decisions for which Europeans have to be consulted.
Not sure the constitution would have been more successful this way... and if yes then Newropeans would have been in favor of it.. because people would have decided to vote YES! Simple.. Democracy..
No more no less... no left or right approach... just democracy.
Best
David