Yeah I was having a think about this too. Maybe every dragon battle is some sort of set piece? and you use the environment to trap/kill/wound them tho that would be a drastic departure for Beth and TES in general.
It won't be a set piece as you put it,because dragons aren't scripted,they can go anywhere,any time they want to.
So are you saying where ever it lands,the enviroment will have a trap for it?....no...doesn't make sense.
We have to use our skills that we get better at,and that is what perks will be used for too.
Also archers may be able to use flaming arrows.This is NOT comfrimed,it was just seen in concept art.
A bandit with a bow and flaming arrow.