If I were one of the plotters, my plan of action would be to:
(1) get the section in the CCC on Capital Punishment changed. Not many people would bother very much about this, because Capital Punishment is already abolished in most countries, where it is regarded as a self-evident barbarism. But a change in this part of the text would serve to establish firmly the principle that doctrine in the Catechism can be changed (the change made here by S John Paul II affected prudential, not doctrinal
(2) get Communion for 'remarried divorcees' into the text. The ground for that has already been prepared by those tedious and corrupted 'synods' and by Amoris Laetitia and the papal back-up given to one interpretation of that lamentable document.
(3) make a combined onslaught upon Humanae vitae and the teaching of the Church on homosexuality. The link between those two parts of the Magisterium is, of course, that they both uphold a radical link between sexuality and procreation.
As I have said before, what I find most inexplicable about the current attacks upon the Church's immemorially ancient teaching on sex is the implication that sexual temptation and sexual sins are part of a new situation facing the Church, calling therefore for new thinking.
As if the previous millennia had known nothing at all about sexual temptation ... as if (according to the old English joke) sexual intercourse really was invented in the 1960s by the Beatles.