My Saturday Roll20 Modos game opened my eyes a little this week:
Things get chaotic in battle!
Out of the chaos, though, came a revelation. When the initiating player announces his action, and each player takes a moment to declare a reaction, and then everyone rolls their contests, the GM gains another opportunity for storytelling. Each player is thinking, “someone did X, I reacted with Y and my roll was Z. So what exactly happened?” When the GM assembles each action and its contest result in order, a mini-story is formed that makes combat seem more dramatic.
There’s a danger here that the GM envisions the character’s action differently than the player did, so it’s advisable to pause and let players contribute during this storytelling process.