I've came across a sentence
in a manga, but I can't find any explanation on this pattern, so I don't see how "speaking of" makes sense. A "bad move" isn't mentioned previously.
The character thinks "The last move was pretty interesting", and continues thinking on the next panel with the mentioned sentence.
The official English translation is
"Most would consider it to be a bad move",
but I feel like there's more to the original.