Based on the other interviews he has given this week, I think he's mostly referring to Noctis' role as a "weapon summoner". From the beginning, Noctis has been presented as this super cool Advent Children style character who has a huge array of weapons he can summon at any time to fight his enemies, and he can teleport and so on.
So I think he's basically saying while it's possible to design a game where every single weapon had it's own moveset and things were really technical, he didn't want to go in that direction (or Nomura tried to go in that direction and failed to make it work!). Instead there will be a single attack button, and you equip weapons on a limited deck, and the game picks what to use based on the context (where you're facing, what enemy you're fighting, the range, etc) to create fast flowing action which looks impressive and also works.
This is just my guess, but I get the feeling from his comments that they're making a game where your decisions going into a battle are equally if not more important than how you actually control the character in the battle. FFXII could be a good example. Depending on how you set up your party AI, what weapons are in your deck, what abilities and magic you have equipped, etc, it could make encounters much easier or much harder, rather than the player's ability to manually dodge every attack or execute complex combo strings.
