Great start! I was on the SE side of Phantom pre-Splunk. One thing I see a lot of traction in over the last year is data warehouses like Databricks & Snowflake and dumping OCSF data into those. I think an area where you can outshine is by offering something like Clickhouse as a data lake alternative along with OCSF as a schema for a bulk of your builtin integrations.
If you want to chat regarding feel free to reach out.