During the talk about Street Fighter V and an ideal fighting game, Umehara pointed out that the real fun in a game lies in pushing buttons (lever/stick doesn't count).
Umehara explained that it all comes down to the fact that people want to push buttons and get some reward. A game is more fun when they can do this as much as they want. As a result, a game is less fun if it promotes defensive play style–because they are given less time to push buttons.
Umehara also added that you will be penalized for doing nothing in other games such as mahjong and poker. That makes him wonder why it is viable to do nothing in fighting games. He suggested that a fighting game should promote play-making, for example, by limiting how many times you can block (10 times) or escape a throw (5 times) and reducing timer from 99 seconds to 40-50 seconds per round.
Umehara said that, just like in real world, people who work deserve recognition, regardless of their skill. Beginners should be able to win simply because they work harder in a match.
As for Street Fighter V, Umehara feels that the game's pace is too slow, as there was nothing else to do during the long block stun. He suggested that players should be able to perform something, not just waiting for the sequence to finish. He understands that it is still in development, but warned that Capcom definitely don't want to launch the game without some tweaks.