I agree with all 3 points, therefore no vote.
When you release a new BEST OF album every year a la Koda, it loses meaning. However, there are artists like DOUBLE or hitomi who release worthehile BEST albums, therefore BESTs are a good idea. But, as long as the BEST has good material, it doesn't matter how many get released. Kuu's BEST albums may be extreme, but they are worth it, IMO.