Salam
I'll cut to the chase. From my research, I believe Quran was collected during Mohammad's (s) time.
So what is collection of Uthman about? Do research about hadiths being forbidden to be written by first 3 Caliphs, but long story short, I believe there has been a war to separate the Ahlulbayt from Quran and vice versa and when hadiths were forbidden to be written, a lot of people then said, well maybe we can write commentary in the Quran and show where Rasool said it's about Ahlulbayt (a).
And so for example, Ibn Abbas and Ibn Masud wrote "and his chosen Masters (with him)" in commentary with reference to "Warn the the nearest of your kin", but Uthman had to take all that and hide it from the masses.
So while Abu Bakr and Umar went out to burn ahadith books, and you can do research on this, yourself, and forbid writing of ahadith, people wrote commentaries.
The real purpose of Uthman collection per words of Imam Reda (a) in debate between him and scholars about family of Mohammad (s) and meaning of a hadith they attributed to the Rasool (s) about the nation being his family (they were trying to say by Ahlulbayt - the whole nation of Muslims are meant and then Imam Reda (a) argues from Quran there is clear distinction between Ahlulbayt (a) and the nation), found in the book tuhufuqul uqool, is that Uthman did that to hide such commentaries.
Therefore this is real intention of Uthman, of course, he won't say that so did in the name of protecting the Quran and collecting it.
@danieldemol
This is according to my research. There are many proofs that Quran was collected before Rasool (s) died according to both Sunni and Shiite hadiths.
As for Quran of Ali (a), it contains the chronological order and commentary to know the situation of each verse when it was revealed and how, and this will be important when the Mahdi (a) comes back as we can put all this in a program (the time of order of verses of Quran) and see how Quran was dynamically built over time, and with the situation, which will be a sign itself that Imam Mahdi (a) along with miracles he is showing, is the guidance for us.
I'll cut to the chase. From my research, I believe Quran was collected during Mohammad's (s) time.
So what is collection of Uthman about? Do research about hadiths being forbidden to be written by first 3 Caliphs, but long story short, I believe there has been a war to separate the Ahlulbayt from Quran and vice versa and when hadiths were forbidden to be written, a lot of people then said, well maybe we can write commentary in the Quran and show where Rasool said it's about Ahlulbayt (a).
And so for example, Ibn Abbas and Ibn Masud wrote "and his chosen Masters (with him)" in commentary with reference to "Warn the the nearest of your kin", but Uthman had to take all that and hide it from the masses.
So while Abu Bakr and Umar went out to burn ahadith books, and you can do research on this, yourself, and forbid writing of ahadith, people wrote commentaries.
The real purpose of Uthman collection per words of Imam Reda (a) in debate between him and scholars about family of Mohammad (s) and meaning of a hadith they attributed to the Rasool (s) about the nation being his family (they were trying to say by Ahlulbayt - the whole nation of Muslims are meant and then Imam Reda (a) argues from Quran there is clear distinction between Ahlulbayt (a) and the nation), found in the book tuhufuqul uqool, is that Uthman did that to hide such commentaries.
Therefore this is real intention of Uthman, of course, he won't say that so did in the name of protecting the Quran and collecting it.
@danieldemol
This is according to my research. There are many proofs that Quran was collected before Rasool (s) died according to both Sunni and Shiite hadiths.
As for Quran of Ali (a), it contains the chronological order and commentary to know the situation of each verse when it was revealed and how, and this will be important when the Mahdi (a) comes back as we can put all this in a program (the time of order of verses of Quran) and see how Quran was dynamically built over time, and with the situation, which will be a sign itself that Imam Mahdi (a) along with miracles he is showing, is the guidance for us.