BICC is suitable for certain use cases, but it has several limitations and is not particularly user-friendly.  BICC uses PVOs which cause a huge operational gap among the users:
IT/DW teams: Its a multi-hop(BICC-file system-OCI-ADW-delta share) process which is brittle and fixing any breaks is cumbersome.  You'll spend more time fixing things than actually getting value from data.
BI & Data analysts:  Try to consume data via PVOs, struggle to understand schema, deal with missing or too many fields. Creating dashboards require back & forth and increases time to data. 
Business users:  Struggle to find actionable insights in dashboards, try to make the best judgment, leading to inaccurate decisions, unresolved problems, and missed opportunities
You are also spending a lot of money on OCI, ADW et al.  
Check out BI Connector(https://www.biconnector.com/oracle-fusion-data-warehouse-integration) which offers a more direct and cost-efficient approach to bring your Oracle Fusion to your Lakehouse/Data Warehouse without any of the above shortcomings.   Another advantage is that BI Connector allows you to directly bring Oracle Fusion data into Power BI(https://www.biconnector.com/powerbi-oracle-fusion-connector/) without any intermediate DW/Lakehouse also.  You get a 2-in-1 solution.