Totally beside the point, but "How Facebook is losing its essence" is a statement. You've analyzed the situation and you're going to tell me what's happening.

Totally beside the point, but "How Facebook is losing its essence" is a statement. You've analyzed the situation and you're going to tell me what's happening. Following that statement with a question mark just tells me that you're frightened of sharing your opinion. Don't make a bold statement if you're just going to wimp out and make it a question.