Tolkien's Organization of Perspectives/POVs

One of the main topics we discussed on Tuesday was how Tolkien chooses to include multiple perspectives which helps the reader get a good look at all the different events occurring  during the story. This use of multiple point-of-views/perspectives is especially useful in The Two Towers as well as The Return of the King since the Fellowship has split up into branches extending all over the map of Middle-earth. I greatly appreciate Tolkien's choice to divide up the perspectives because it really helps to see the development and growth of not only the "main" characters (like Frodo, Sam, or Aragorn) but also more "minor" characters (such as Merry and Pippin).

That being said, I've always thought it was an interesting decision of Tolkien's to divide up The Two Towers into Book 4 being exclusively Frodo and Sam's journey and Book 3 containing the events related to the rest of the Fellowship. I understand this choice on an organizational level since Frodo and Sam are isolated from the rest of the group so it makes more sense to put their whole story together. However, it does leave me a little confused in regards to the timeline of events since the split-up perspectives don't make this too clear, although Tolkien does ensure to include how time passes by mentioning how many days have passed, etc. Ultimately, understanding how different events align doesn't really matter since everyone miraculously and conveniently ends up in Mordor at the same time in The Return of the King.

These are just some ideas that occurred to me after our discussion on Tuesday. I'd be interested to know anyone else's thoughts on this!