Voynichese is a numeric cipher?

[oshfdk]

I assume that the author had basic intelligence and was also aware of this problem, but he could have solved it differently...

There is no shortage of ways to implement a scheme superficially similar to Voynichese. One of these scheme could be the right one. The ultimate test is of course if Voynichese under this scheme decodes to anything sensible. But cracking even a more or less known method can be hard. A good intermediate result would be just showing how the system reproduces the statistics of Voynichese.