interesting idea! First thought is that I'd like to see a tutorial or at least a clearer description of what "dicing" is. Something like, "Form new words from the letters".
I did feel like the puzzles were too open-ended for my taste. Branching off, I wonder if there's a variation where, for example, you know the starting letters of two words and you have to fill in the rest. Or, the goal is to make new words, as big as possible, with the least number of modifications.