No, it's a certainty the Conservative side could get something (lots of states) and the leftist side would not (only a handful of states) gets nothing. Imagine the end effect of the electoral college over the popular vote for the presidential election, and amplify that effect such that a state like Oklahoma has the same voting rights as California. Now, mind you, this is JUST for the creation of the amendment. Then, it must be ratified by 3/4.
This way, there is no possibility of damage to the 2a. There are two outcomes - limiting the federal government if the Amendments Convention succeeds, or no amendments if it does not.
When explained like that it does sound like a win win.