I can understand that you may be frustrated with the amount of content about Classic and more specifically WoW: Forever, when your interests might not rest with either of those. However, the allocation of development resources, decisions about which WoW products are supported, and the broader impact those decisions may have on the game are outside the scope of Customer Support.
Support isn’t able to provide insight into internal development priorities or make changes to how Blizzard’s social media content is presented. If you don’t want to see specific content on Facebook, you’ll need to use Facebook’s available options for managing or filtering the content shown in your feed.
You’re welcome to share your feedback about the direction of WoW through the appropriate feedback channels, but Customer Support isn’t able to address or debate those broader development decisions.