I find the concept interesting and I can see real applications for something like this (delaying someone's access to a file). For example, one could use that to disseminate press releases ahead of time without actually revealing the contents.
That said, it seems the current implementation is impractical because you will "on average" decypher after a certain time, but that time can vary greatly. Are there plans or methods to explore in order to make this more deterministic?
That's a very good question, one I've been thinking about a lot. The current implementation, has even distribution. Even changing it to normal distribution would greatly improve this. Not certain yet how to achieve this, however.