Keyword management in LR CC is genuinely too basic. Actually, it is even completely useless because of fundamental capabilities missing, such as:
• define a hierarchical organization of keywords
• assist the user in adding keywords (auto completion to avoid misspelling)
• assist the user in removing keywords (warning when the keyword is already used on some images)
• consolidation on "add a keyword to a photo": adding a child keyword to a photo will automatically add all the parents keyword too"
• consolidation on "remove a keyword from a photo": removing a parent keyword from a photo should also remove all the child keywords
• keep consistency when renaming an existing keyword (all instances of that keyword have to be updated among the library)
• keep consistency to avoid doubles
• show a badge on image thumbnails in grid view to indicate the presence of keyword
• import/export function