I intentionally avoid using lavalier mics. Their amplitude and timbre are all over the place depending on the direction you're looking, they pick up clothing noise, and you're either tethered to a wire or have to deal with the complexity and limitations of a wireless system.
Headsets work better overall, but are highly visible and still add a layer of complexity. They also sound like someone talking directly into your ear. Even with additional postprod [going all the way to room modeling], I've never managed to make a headset sound totally natural. If others have, I'd appreciate some tips.
In any case, as someone who spent ten years dealing with lavs and headsets in live performance as a sound engineer, I avoid them in my own time as much as humanly possible :-)
The stereo image was intentional, it's a trick for removing perceived echo/reverb by spreading it out across a stereo image instead of it all piling up right behind the voice in mono. That said, the image was wider than I'd have liked. That was a result of mic placement and angle, another tradeoff to avoid wide amplitude changes as I moved around.
FWIW, several other video producers wrote me to ask how I got such great sound without a lav, and (like you) others wrote to mention that they found the very wide stereo distracting. I'll tinker with it more in the next vid.