After doing some research, here I am.
The main point of contention is about the fact that the Daizenshuu seems to mention that the universe is made up "4 Galaxies", which would be contradictory.
However, this is being heavily taken out of context. Let's look at it.
(The scans are from Chonzenshuu 4/ Daizenshuu 7, their text is the same)
Those scans do say that the universe is divided into 4 Galaxies.
However, as I said, this is being taken out of context.
Look here :
In these two scans, the infamous "4 galaxies" are mentioned, but then it is also mentioned that there are infinite actual galaxies in the universe.
This would seem like a contradiction, but it's not.
In fact, both the English and Japanese scan mention the fact that the terms "West/South/North/East" are just denominations/units that the gods use through their duty to supervise outer space, which is filled with galaxies.
This is consistent with the fact that, as Zamasu said, the Daizenshuu seems to switch from "4 Galaxies" to "4 areas/sections/sectors", which is something the blue scan I posted above also does.
This is already pointing out that such contradictions are nonexistent. However, it's not over.
The opposition here brought up three messages that came from Herms,the most famous Dragon Ball translator, and specifically from the Kanzenshuu :
Here, it seems that Herms was talking about the fact that the guidebooks and the Daizenshuu both stated that the Dragon Ball universe had "only 4 galaxies", which would've solidified the opposition's points.
Well, no. Aside from the fact that Herms clearly states that it's open up to interpretation, some of those pics cut off important parts of Herms's posts. Look here :
(Sorry for the double pic)
Herms himself admits that the "4 galaxies" are just denominations used by the gods,in reference to the Daizenshuu.
In the 3rd image he even proceeds to say that "Galaxy" in the "4 galaxies" sentence has nothing to do with the astronomical term, and that using the term "Area" would be more correct.
And this solidifies the fact that the "galaxies that exist infinitely" statement, and generally speaking the statements from the Guidebooks about the infinite universe are reliable, otherwise Herms would've corrected them (as in he would've corrected the translations).
As we can clearly see, he didn't. Which means these statements are actually fine/consistent.
Herms mentions that infinite galaxies in a universe sound weird to him, but tbh it's likely that he was using RL logic which does not work here.
So, in conclusion, the Daizenshuu statements are not self contradictory, and those arguments came from the fact that a scan was being taken out of context.
With all the other scans Zamasu Chan and others posted about the universe, I can safely conclude that the Dragon Ball universe is High 3-A or Infinite in size.
I just wanted to make clarifications on the whole 4 Galaxies mess.