The releases are posted here -> https://github.com/u3games/L2J_EventEngine/releases
If you need a guide, there is one -> https://github.com/u3games/L2J_EventEngine/wiki
As event engine developer, you right. The engine still needs more work.
Anyway, the only way to improve the project is the people use it to receive feedback. You know, when you see the people use your work, it gives you motivation to keep working. :)
I agree about the lang.
About the suggestion, i don't know why we have a list if the engine only supports one event at the same time (for now). Whatever, thank you.