Many arcs ago, Spider lady confronted her birth father. Many of the things I have seen regarding the action elements could’ve been said there, but people liked it. So what makes it so different here?
It was a one time, it was sudden and it was the first time. And the ratio fight/slice of life was still very much on the slice of life side.
This battle comes after the battle with the husband in the box which was itself before all the preparations for the battle. The ratio shounen manga/slice of life (counted from after the heart transplant) gives much more place to the shounen part.
One time is an exception, third time it's not. This imply that the battle manga direction is something author wants to keep.
The battle part are more detailed too now. First fight was short, not a lot of panels.
Which put more emphasis to this impression.