Considering what you have written in Getting_Started/Build should we simply delete the existing content of Getting_Started/Build/Distributions/Linux_From_Scratch and replace it with your message on Getting_Started/Build ?
No, I think that this current information is obsolete and most of it is redundant.
IIUC, it is now your intent to add information about the dependencies needed for KDE which makes this further unnecessary for those that are just building from scratch.
In general, I would recommend the BLFS book to anyone that is building from source, so I think that the link is now in the proper place. That is unless you intend to duplicate that material in that much detail. Have you read it?
I can replace the obsolete notes for the old versions with some notes on building the more obscure dependencies and possibly other relevant information for building from source that isn't currently covered by the BLFS book.