The original grammar essays for Vilani had a number of colorful notes about little grammatical things that were in Old High Vilani but are now unused and/or are considered archaic. So, when the opportunity arose to simplify the grammar, I decided the old stuff was still golden, and deserved a home. What better home than with the dozen or so footnotes hinting about an Old High Vilani (et al)?
Here's a basic run-down on the elements of Vilani I had pushed back into OHV (or farther):
The relatively new dative-benefactive prefixes officially replaced the old /ka-/ prefix.. but in informal writing /ka-/ appears to be useful, since we can usually determine the sense of the sentence from context. The main benefit of replacing /ka-/ with a larger inventory, in my mind, was to remove the applicational suffixes from the verb, which simplifies things. By tagging this old style of writing as a classical form, then we can still use it when we want something so look archaic. Or whatever.
The reduction of irrealis also meant that the four irrealis copular verbs were no longer needed -- in the modern grammar. They're still useful for obfuscation when you want to be Classical about what you're saying.
The Personal and Demonstrative pronouns were rearranged a bit and, hopefully, simplified (although I can't be sure of that). That said, there are still correlations between the old version and the new. In a fit of linguistic fervor, I also added P&D pronouns for Kaalan. No idea why.
Of course, removing irrealis gave the grammar plenty of elbow room for the subject/object verbal prefix list. And I could then provide the old list in OHV, and also provide the list for Archaic Vilani as well (what fun!).