The roadmap is no longer published in detail since actual priorities has turned out to be mostly driven by client requests.
The big picture (in descending order of priority):
Support for existing gateways. Keep up with exchange changes. Add new features. Resolve issues. Add new gateways.
New features as requested by clients. Typically sponsored (unless it’s generic gateway functionality).
Expand “modular” coverage to match a complete industrial scale trading system. This includes
Algo framework. Library of examples. Parameters. UI. Execution performance analytics.
Position keeping. Drop-copy. Integration with databases. Portfolio hierarchy. UI.
Low latency tooling. UDP. Multicast.
Open access. FlatBuffers/TCP. Python.
Priorities may change at any time.