The suggestions listed in the article weren't that bad. One I found particularly interesting was:

18) Destructible environments, like quake will mess up the ground, fire will burn grass/melt snow, certain attacks will leave grooves or craters in the ground, etc. so at the end of battle you see what effect you had. Also moving fight maps, like the fights still take place in a glass-shatter/swirl type area but your characters move around alot, like at first you run up and attack but don't return to your starting position, you stay where you were, spells and attacks would have a knockback effect, say for example in the fight with palmer, you could knock him back far enough that he would crash through a window in a house and your fight continues there where you'd break chairs and tables during the fight.
Not so much the destructible environment, but the the fact that your characters would move around the battle arena. This was the case in Grandia II and it was pretty cool. Though I think AoE spells and the like would detract from the traditions of Final Fantasy, so I'm not sure I'd like to see it implemented. I like the suggestion of allowing you to explore more of the world/Midgar. Exploring all the different locales was one of my favourite aspects of FFXII and something I've always enjoyed in RPGs, so that'd get a thumbs up from me.