MAL > HB
But yeah, HB has past the honey moon phase, it's a natural process that not all relationships/sites get through. The hype has passed, broken promises, many changes, need for popularity, new features that take activity, etc. The forum used to be so active because that's all we had, feeds were hard to use, there were no clubs groups, etc. Feeds eventually got better which took away activity from the forum, then we got groups and activity fell even more. From what I've heard, the same thing happened to MAL.