He's saying it's his opinion so as not to have crazy Grievous fans lay into him. The guy gets a lot of hate mail.
Proof of this? And that his statement was intended to be objective instead of subjective?
Also the guy has talked to Lucas in depth about all these things on a daily basis for like 7-8 years. You really think he forgot to ask Lucas about how good Grievous is? LOL.
Quote?
Fact is he's actually defended Grievous to Lucas. He says on page 1 of that same Interview how IT WAS LUCAS who wanted to have Grievous losing to Gungans, and it was FILONI who said Fan won't like that.
Then it's what a lot of us debaters like to call an inconsistency, and Filoni and Lucas both evidently realized this as well considering they acknowledged that Grievous losing to Gungans is out of the norm, and would be portraying him as less impressive than usual.
Filoni: Yeah, because that was a huge challenge. I think I've said before how I went back and forth on that one with George several times saying, "Wow, if we do this to Grievous, I think that's going to be a big, big loss for him. His credibility's going to go down." You know, we argued about it back and forth several times trying to figure out was that going to be the best move. George was always pretty resolute that it was going to be fine, and he talked with me through how we could achieve it. And I thought, "Well, if we're going to take him out, then we have to lose something pretty big on the good guys' side to make the sacrifice seem pretty meaningful." So we had to take out Tarpals
Having said that, as far as creative decisions go, the idea of Grievous - someone who has built a career out of wholesale slaughtering Jedi by the hundred - losing to Gungans, is hilariously retarded.
In either case, like you said, he's in charge on that show, so it shows us the creators intentions of Ventress beating Grievous simply being because she's better than him, not because they're on some dark side nexus.
No, an opinion isn't the same as creator intentions. It isn't a canonical fact that Ventress is a better duelist than Grievous. The only fact of the matter is that she was able to beat him on a Dark Side nexus which would amplified her beyond her normal abilities. Also, in other sources Grievous has been noted as being superior to all of Dooku's other apprentices/proteges, has beaten Ventress, and has had better dueling and physical feats than her. So the idea that all of that can be changed just because Filoni or Lucas want it to be so is just ignorant on their part and anyone who would subscribe to that statement. Luckily, it's just Filoni's opinion, so it doesn't even matter.