My answer is yes, you should create profiles for any assessment common enough to be of interest to the oncology FHIR implementation community. Set boundaries and demand participation. In doing this you MUST then create a easy to find repository of the assessments. Buried in mCode may make this more difficult. At least create a separate tab and full guidance on how you did it and how others can replicate and submit additions. But the collaboration to create needs mCode to be successful. The different code systems used in the different profiles you created are examples of the benefit of your approach.