Have we ruled out simple substitution unwisely?

[eggyk]

Again, I encourage you to play around with this to get a feel for what works and what doesn't. Whatever you do at a given location in a word (in this case [in]-clusters at the end), will still result in severe positional constraints. You'd also have to randomly pick how to parse any given [in]-cluster. This can be simulated easily by sectioning your corpus, processing each part in a different way, then putting them back together.

Yes, i've been thinking about different experiments to do this, random chance, chance based on potential plaintexts etc. 

Unfortunately i've ended up trying to defend the examples i gave instead of talking about the class of examples itself. The example I've been explaining does do something differently to the existing methods, namely acknowledging that groups of strokes within a transliteration alphabet may correspond to multiple values.

Those types of ideas are what I wanted to explore here.