From the text of the proposal I realised that I have no idea how the procedure works. For example, some of the articles are trivially expanded with extra paragraphs or rephrased, but other articles, while preserving original paragraphs, receive paragraphs with the same number and a superscripted index, which can contain text contradicting the original paragraphs.
Article 85, about the number of presidential terms, as proposed, contains the following paragraphs:
To say that this is confusing is an understatement. Paragraph 31 is in fact annulling paragraph 3. Why is paragraph 3 still there then? What does the sentence "Положение части 3 статьи 81 Конституции Российской Федерации, ограничивающее число сроков, в течение которых одно и то же лицо может занимать должность Президента Российской Федерации, применяется к лицу, занимавшему и (или) занимающему должность Президента Российской Федерации, без учета числа сроков" even mean? How can paragraph 3, which is about the limited number of terms, be applied without consideration of the number of terms? What does it mean for it to be applied then?
Why didn't they just remove or replace paragraph 3 entirely?
UPD: I realized that I was reading the above text incorrectly, and that rather than removing paragraph 3 they are in fact strengthening it by finally removing the loophole hiding in the word подряд. 31 is just an unfortunate consequence of this.