I'm not a server side person but from my experience, other types of data app developer might want to join are various kinds of product-specific data, like feature flags or user-specific dimensions for each request. These aren't typically in the trace data itself.
These are different from what product-agnostic "performance engineers" tend to look into, so I understand if this is out of scope. Although I think product people should look into these numbers as well, instead of just throwing them into the performance team's plate :-/