The update to REM weapons is due to the weapons now being outdated and very underpowered compared to the new delve weapons. I could level any DD job to 99 and buy its Delve weapon (or even AH one like Senbaak Nagen) and, provided we both know what we are doing, I will outdo someone using R/M/E. Unless something is done, why would anyone now bother to make anything that isn't Ochain/Aegis/Gjallarhorn/Daurdabla/Yagrush/the other few useful weapons left? And what about all of the people who have already made them?

When did Gjallarhorn/Daurdabla/Ochain/Aegis become outdated and underpowered? They didn't. I can't level BRD to 99 and quickly be an elite bard like I could with a DD job. It still takes a lot of work to get both Daurdabla and Gjallarhorn if I want to be the best bard possible.

This is their reasoning behind why they are not updating shield or instruments. The shields and instruments, as they intend, will always be number one. You're really comparing apples to oranges. Many of the R/M/E weapons become overshadowed completely by new gear. The instruments did not.