I wouldn't want the series to go back to the second game's graphics- while the fifth game was seriously lacking detail I would actually prefer them doing that instead of going back to full 2d.
But I guess if they're going for DS...yeah, I guess 2d would be better since almost all the 3d I've seen on the DS is just painful to look at.
To me, the only thing good about V was the story. The game itself, as well as a large chunk of the stars, was pretty boring. In fact, that's the way all the Suikodens feel to me. The battle system has never really wow'd me in any way. The only one where I had a little more fun with the battle system was III (Yeah I guess I'm weird like that).
As for this game, it looks incredibly boring, especially the characters. I can't quite put my finger on it, but they feel even less interesting than the characters of any past Suikoden. The battle system just looks like Suiko IV's, which makes me scratch my head because as far as I know, everyone considers that the worst of the series.
Konami are this gen's Sega.
And here I thought Sega was this gen's Sega.