There are a few general issues of project direction and/or needs.
The need for more comprehensive and sophisticated testing idioms.
Making engine pluggable so various routers can be used. Entails creating an interface, and several unsucessful attempts have been made. Engine & engine Ctx might need to be decoupled, a flotilla ResponseWriter might need to be resurected, and use of engine data changed to behavior all need to be addressed to start.
Bloating of the Ctx, Env and Flotilla overall should be addressed.
There are a few general issues of project direction and/or needs.