The CRL's are updated from time to time, if you have a look at the bottom of the ROTJ CRL you will notice it was last edited in August 2018 and I don't believe much was changed. Updates can happen to any costume when it's always best to check in with the CRL's from time to time. This is why checking back with them is important as well as checking the gallery seciton, build threads and researching. Top section of the CRL's says: This document is not intended to be a detailed how-to on costume construction; rather a visual guide to be used for 501st costume approval. Details on construction may be found on the respective costume detachment web forum.
With that said there are a lot of what you have posted which will be addressed in the next round of CRL updates.
Armor is indeed overlap constructed
Boots do have white/tan soles
Boot soles shall be white, off white or have the sides painted white.
Shoulder rivet
One pop style rivet shall be present on the front of each shoulder bridge. May be painted white.
No large tab at back
Shoulder straps must be curved to lay flat against the back plate, and may be affixed with Velcro of needed.
No large rear tab is present.
Belt
Knee/shin rivets
The thigh ammo pack may have an extra rivet on the front, located toward the top between the second and third boxes on the wearer's right. May be painted white.
Hope those images help, you can find more in the ROTJ gallery section https://www.whitearmor.net/forum/gallery/category/26-rotj-tk-reference/
If you would like some further clarifications on the ROTJ CRL in regards to your present build you could contact our head DO Joseph @justjoseph63 or our DL Sarah @Alay