What they probably need is an addiction-NOS diagnosis, for people whose attachments to various things have gotten out of hand and become uncontrollable, causing problems for them in their daily lives. Whether that's gambling, gaming, or even exercise, there should be a way to say "This person is in my office because he has been engaging in this activity to the point that it is affecting the quality of his life, or harming him or those around him, and he cannot stop on his own." These "addictions" are not quite the same thing as drug addiction because there's not a huge physical component; they are more like hobbies gone out of control, so that they control the person rather than the other way around. And they are not nearly as dangerous. The number of people who've died of self-neglect due to engaging in a non-stop hobby is miniscule compared to the people who have died because of damage from drug addictions.
There needs to be an exclusion criterion: "The problematic activity is not an unusually intense interest associated with an autism spectrum disorder, and is not a perseverative activity associated with a neurological condition or with another mental illness." Because an autistic special interest is a different thing, with a different cause and different features, from a run-of-the-mill non-drug addiction; and you need to make sure you're not classifying a paranoid obsession, an anxious habit, or an OCD compulsion as an addiction.