To be fair, when people asked him for native ren'py features (other than roll back which some Ren'py games disable too since it breaks their games, and saving during the conversations), he usually added them pretty quickly.As for everything being readily available in Ren'py, up until 0.83 it probably was easy to do it in Ren'py but after the overhaul of the UI it wasn't really possible although probably not impossible
Personally, I would like to see the 'history' button to be accessible during the conversation in case I misclick, otherwise just make sure the space bar and both enter keys work to advance the text and I am happy.