Thanks for your feedback ! :)
I believe there's an impact on game performances when we scale up the player too much. Perhaps every calculation begins to be more intensive on the engine due to high coordinates, large numbers, etc.
Also, as you say, there's also the feeling that things move slower once the camera moves back / player is larger but still moves at same speed.
Actually, we even wondered if we should slow down a bit the player once it's bigger, but we quickly realized there already was a slowness feeling induced from the scaling up / dezoom.
I didn't really see it as a problem, but I understand it can be seen as one ^^
Thanks, I must say I'm starting to love adding these comic-like dialogs in our games too :)