If his end goal is to simply liquidate his position, maybe the "gifting shares to trust" is just part of a tax avoidance scheme (even if it sounds illegal, it often isn't).
I've seen this very commonly with private company founders expecting an exit in the next couple years, but very possible this situation is completely different.
The fact that it triggered a clause to eliminate preferred voting shares is very odd. Either a complete oversight by the guy's lawyer, or if it was done intentionally, I have no idea.