

Both are important, even if everyone is getting lots of action (feels fast), if combats end up needing to be split between multiple sessions, people are going to complain that the story isn’t moving or that they have been stuck in combat forever. If people are waiting 30+ minutes for their turn, they are going to stop paying attention and do something else while waiting.
Considering (according to Wikipedia at least), the entire franchise has only sold 88 million copies, even if this was worded to be for the franchise to reach 100m would be a stretch.
100m copies sold for a single title would make it 3rd best selling game of all time loosing only to Minecraft and GTA V.