I didn't like the way the boss battles were done either. A few of them were good like Agnus and Dante but the other ones had some serious problems. The dice game was boring, but so was gryos game with Nero's arm, so was puzzle of Mittis forest, some of the platforming sections were especially bad. Even the missions in general were at times tedious affairs.
Will they fix anything like that? No. Why? Because those things arn't inherent problems with the game, they are design choices the developers made. Capcom arn't here to redo their design choices. These things weren't inherently broken; they were unenjoyable.
Capcom arn't here to remake DMC4, a game they finished in 2007. Its like someone else said. This game is like DLC content that should've been released at the time. If they when in to redo everything, it would be a remake, not a special edition. The budget they spend on that could be spent on other projects.
Thats not what this is about. Its about giving the fans extra content, not remaking a game that they felt was sufficent back in 2007/8.