tbf - yeah, if you describe something clearly atypical and make it sound awesome, I'd have you do more damage and possibly other stuff.
For example when the Barbarian said he was going to leap off the roof of the entry down and flying stab the zombies I suggested if successful he'd have an extra d6 damage due to the height. He had a poor Athletics roll so he kind of stabbed them and fell prone instead
I am not talking about leaping off stuff, I am talking about proper weapon techniques like half swording and the gazillion of differing duelling techniques.