http://xenforo.com/community/threads/ability-to-upload-icon-avatar.26854/
http://xenforo.com/community/threads/styles-section-thumbnail-instead-of-user-avatar.26926/
For a community centered around discussing TV shows, movies, etc., a movie review
is a resource. Its an example, it works. Its not adapting it to be 'something its not', its perfectly viable as a resource in its current state.
As with XenForo, this isn't the end all be all of features in the next release, Mike & Kier haven't announced everything. This has value and many people asked for it. Suggestions that are included in the software are partially based on like count. That's a fact. Its not the only reason a suggestion is included or the only factor in its inclusion. Coming from a developer, implementing a feature is a balance of time, effort, complexity, and the possibility to break backwards compatibility. Larger suggestions (such as ArnyVee's smiley categories) are quite complex and have the possibility of breaking backwards compatibility in terms of users upgrading.
Its an option, so if you find it useless, leave it off. If you see ways to improve it, make a suggestion. Dismissing a feature because you don't see the usefulness here is unproductive at best.