Basically they said the wii isn't exactly being known for great graphics, and they understand graphics plays a very important part in a MH player's experience, and a lot of people were doubting how MH would look on a wii. So they had to go the extra mile and tried very very hard. Their goal was to make MH3 to be the best looking game on wii.
Iwata then went on and told them the designers in nintendo were stimulated by how MH3 looks and especially the zelda team were under immense pressure.
The wii-mote part was quite funny. It started with Fujioka saying good things about the wii-mote, and then Iwata told him just be honest about it, so he said 'to start off, buttons...' and Iwata finished off his sentence with 'not enough of them' :lol
Tsujimoto then said they considered using motion control, but at last decided against it because hardcore MH players would spend a really lengthy time playing, and motion control would simply be too tiring.
They finished off mapping the controls just before TGS last year, they almost couldn't make it to the show. They have good response for the wii-mote control and Tsujimote's favourite comment was "I'm relieved"
And halfway though the development for the wii-mote, Nintendo suggested to sell the game with the new classic controller pro, and this is a first for Nintendo to collaborate with a third party for the development of a hardware. Even within Nintendo there were people asking 'are you really going to ask a third party about that?', but Iwata wanted previous MH players to enjoy the game without worrying.
Fujioka said he was thinking 'is it fine that we are deciding this?', like where to put the analog stick, and he said he had a great time doing all these.
There's still a lot more in the interview, but since neither japanese nor english is my first language, I'll leave it to somebody else to translate them
