Different game modes are a good idea but these game modes are also another reason that is stopping me from buying this game right now, it's going to water down the playerbase even more.
Arcade mode? fuck that shit, I was interested in getting RO2 just because there is some kind of progression and bonuses for playing over time, but you'll probably have tons of people playing classic mode where it doesn't mean shit and is basically just RO1 with better graphics, plus if I wanted to play RO1 I'd just go load that shit up and play it. This doesn't help my decision because I've read on alot of the forums the playerbase is already dwindling for RO2 with most popular servers containing many bots, not sure if want.