While there is merit to your proposal, I don't think that will happen as the average American wouldn't really understand what you are trying to accomplish.
What they do understand is term limits and that would, in my opinion, be an easier sell.

My proposal would be to increase Representative terms to 4 years with a 2 term limit and limit Senators to 2 terms.

It takes 34 states to call an article V constitutional convention. The last attempt was in 1983 when 32 states were on board for a balanced budget ammendment.