Stop trying to make simple "connect-the-dots" on internet into something sinister. Do you see me trying to gather followers and insisting that this is the only explanation?
I'm just looking at all available information and seeing what fits and what doesn't for my own amusement. Some theories become less likely with time as more information gets available, some get more.
Navalny apparently having permanent UK resident as head of his investigative branch is quite new. And not having any social media presence is highly unusual in modern age; often happens with secret agents, but there are certainly some people paranoid enough to do it on their own.
...having that very person being the one rushing evidence to Germany though? Why not give it to his wife instead? If Pevchikh was the one who last seen Navalny after he was poisoned (as by current version he was poisoned before he arrived to airport, and they shared hotel room from which they took bottle with supposed Novichok traces), certainly she could enlighten investigators on what exactly happened with him?