I believe he was talking about his front foot placement and asking if it was new, at least that's what I thought the was getting at when I was listening to the broadcast. If that's what he was referring to, Eloy's been using that stance for a while. Here's a HR from the Dash and one from last May & August.
Here's some video of an ST at bat where he's doing the same thing.
I don't think it's anything new, maybe it's more exaggerated at times, but most likely just an oversight on his part? If it wasn't about that them I've just wasted a lot of time going down an Eloy rabbit hole lol.