From a special ed perspective, it may also be valuable to remember that very young children don't need a diagnosis of anything at all to receive services. They can be qualified under developmental delay, and serviced based on identified needs. Treatment is the same regardless of label, and this avoids some of the fallout that may result from early misdiagnosis, where there is ambiguity. The EI provider may be operating under that framework--hence the collection of descriptives, rather than a unified diagnosis.
Implementing appropriate interventions for the language delay, sensory sensitivity, and stimming behavior is more important than applying a specific label to a very young child. You should, however, make sure the referral from EI to your local school district's special ed occurs at age 2 years 9 months, so there is a smooth transition of services.
