Proximate rule does not mean 'only' rule.
Well, the way you phrased it, you clearly made it sound like an either/or proposition, saying that our PROBLEM is that we take the Church/Magisterium for our rule of faith.
In any case, we CATHOLICS form our judgement about what God did and did not reveal in Scripture and Tradition FROM THE CHURCH. We do not take a direct line to the remote revelation like Protestants do.
Protestants rejected the teaching of the Church (the Magisterium) by way of appeal to Scripture. You guys dot he same thing, except you appeal to Scripture and Tradition. Not a lick of difference between you in principle.
Couldn't you at least rephrase your position to say that the V2 Magisterium contradicts and is irreconcilable with PREVIOUS MAGISTERIUM? Instead, you push a neo-Protestant paradigm of appealing to Tradition over and above the Magisterium ... when the Magisterium is what presents Tradition to us. In fact, for that reason alone, the term Traditional Catholics really sucks.
So, when Novus Ordo Catholics accuse me of rejecting the Magisterium, I tell them that in order for me to accept the CURRENT Magisterium, I would have to reject PAST Magisterium. I pull out the contradictory passages between V2 and previous Magisterium, and I ask them, so WHICH Magisterium am I supposed to accept? That's a much better apologetic than running around half-cocked appealing to "Tradition" over and above the Magisterium ... as if our private judgment interpretation of Tradition trumps its interpretation by the Magisterium. It's no wonder that these conservative neocon Catholics have a feast day on junk like that. It's no wonder that they question whether Traditionalists are even Catholic.