Similar to Lab Panel ( Diagnostic Report with logical set of findings), Vitals are captured/displayed on a system in logical group ( BP,Height, Weight, BMI, O2 Saturation etc.).
FHIR does provide a way to group related lab panel item (wrap all related Observations under Diagnostic Report)however for vitals, what I understood is each vital will be stored as separate Observation. This adds an extra set of logic to build the panel and need for querying multiple times.
What is the recommendation/approach around it, to present all vital entries as logical group?
You should look at this, which directly addresses the question: http://build.fhir.org/observation-vitalsigns.html