Cinematography of random little magical elements- what do you hope is done differently?

Personally mine is Floo calls. In the books they make it seem like the person’s physical head is hovering in the fireplace surrounded by green Floo flames- Harry says Amos Diggory’s whole head resembles an egg when he sees it for the first time at the Burrow.

I did not like either of the two ways they represented Sirius in the Floo in the movies- 4th movie it was coming out of the embers/logs itself, and 5th movie it was flickering as part of the flames.

I want to see his actual head, even if it does resemble an egg. And if Umbridge’s hand is gonna reach out to try to grab him, doesn’t it make sense that it should look more, well, physical and solid, than just an image in the flames? How else would she have grabbed him and yanked him out if it wasn’t a solid head?

(One thing I’m curious about- everyone remembers the Chocolate Frog scene on the train from the first movie and Ron saying “they’ve only got one good jump in them to begin with.” However in the books they are never described as moving at all. I wonder if the show writers are going to think moving Chocolate Frogs are so ingrained from the movies that they keep them, or if they’ll even remember that they weren’t originally written to move!)