The thing about character switching is, like Dahbomb says, they can do it if they want to.
I'll try to illustrate one particular issue I see with it. I had a discussion a while ago with someone regarding style switching. I said that having instant style access and more command inputs would be better than having style switching. My counterpart argued they could have extra inputs and style switching, meaning twice as many moves per weapon per character, essentially.
The problem is, at some point it doesn't make sense to have multiple weapons anymore. If you have 20+ moves for one weapon, you might as well have multiple functions across one weapon. Sure, they could have tons of moves with multiple styles, weapons and characters, but scope becomes an issue. At some point, adding things isn't possible anymore because of budget and time.
So the issue becomes, that it doesn't make sense to have lots of weapons and styles if you have character switching. The reasons are scope of production/development, game balance and controller logistics.
For something like Oneechanbara it makes more sense to have character switching because those games otherwise lack the breadth and depth that DMC has, for various reasons. It makes more sense as a central mechanic there.
Optional modes for co-op and character switching could work. But for DMC, I see a lot of reasons that would make it difficult to realize as a central feature in the main game.
I'm tired so pardon if some of this sounds confused or nonsensical.
Capcom is around 5 billion if you want to buy them. That makes about 5 dudes able to buy them. Ideally if you want it in working order when it's bought, would be Sony,or Activision.
Are you sure? How did you arrive at that number? As I said, I don't know a whole lot, so I'm assuming you might know something I don't.
I don't think Sony or Activision are likely candidates for buying Capcom.
There's really no reason to consider Capcom selling out at this point. They're really not in the dire straits that people seem to think. They just expanded and purchased some internal development buildings, announced some new projects, have a new Resident Evil CG movie in the works... A rough patch or a single underselling product isn't going to make or break the company. Does that mean that an offer couldn't be made? Of course not. But Capcom is a lot larger than most of the companies that are being listed here, they act as both publisher and developer, plus they're not owned by a parent company like Atlus is. Atlus' purchase was a necessity due to the overarching failure of their parents company.
Oh, I'm not speculating they're doing poorly and they have to be bought. I didn't mean to give that impression. I know they're doing a lot better than people think. I'm just speculating loudly about the industry landscape and about the possibilities of someone buying Capcom.