"New Playstyles"?
I don't understand what new playstyles there are with the new runes. If anything I think there are less playstyles as all I see in my games are nuke or CC. Before we had some bruiser style champs, and tanking. I don't mean to say cc champs are any less tanky, I mean you might actually be able to walk away from a fight tanking. Not just that, but if you look at each season our options to build anything other than damage on champions that aren't cc tanks has decreased.
The damage dealt to champs screen is also sort of a lie, because this patch might make it look like damage in general has gone down. More realistically champions are just dying more quickly, so it takes less damage to kill them through regen and shield effects.