I have read many accounts of the Constitutional convention, The Articles of Confederation, the Federalist Papers, Max Farrand etc.; and I don't recall any major disagreements amongst the founders as to the inclusion of Art V.
I have also read accounts on Justice Scalia's turn- around on "constitutional conventions". He opposed them when he felt the time was wrong politically. Well, I believe we have now entered another time in which court packing, ending filibusters, election fraud etc. may call for strong measures.
Post script: To what or to whom did the "duh" in your post refer?
My ‘duh’ reference was to liberals thought process for removing 2A.
Since you have read so much: how did the Framers decide that they could ratify the new constitution with only 9 states when the then-current constitution (i.e. The Articles) specifically stated that changes had to be approved by ‘all the states’?