Now I'm coming really late into the discussion here, it seems like the hot topic right now in the thread is about how DMC combat is different from DmC, and their accessibility.
Both are really accessible, and DmC might even have some hard moves and tricks just like DMC3 and DMC4 were filled of, I'd say that both games are equally accessible since I feel exactly like Spawnshooter. When I got DMC3 and played for the first time I loved it because of its simplicity and easy to use combos, it wasn't about mastering input to do a single move, but it was about chaining together moves creatively whilst avoiding whatever the enemies are throwing at you.
How long can I play seamlessly without a pause or misstep in my comboing? Can I clear full fights in one gigantic combo? These things are what I thought about instead of "I gotta master the way of doing a Stinger seamlessly, I always mess up performing it".
Both DmC and DMC keep this, they have that simplicity and accessibility, however, they do it very differently.
And that's where everything splits. The basics of DmC combat mechanics and DMC combat mechanics are very very different, both are simple for sure, but they aren't the same. Similar movesets and styles are in the games, but you have to agree the feeling of playing DmC and DMC is different, because the systems are built up differently.
I myself usually want something based out of the core mechanics of its predecessor in a series, in which it improves on.
What makes me think the change is so extreme is that they changed everything, and when you change everything in a thing it's a pretty extreme change.
Now if this is a question of accessibility or difficulty of a game I'll try to make a comparison between DMC3 and DMC4:
Many agree that DMC4 is easier than DMC3 when it comes to difficulty, but one thing always remained certain, in DMC3 you only had 1 style active, 2 guns, and 2 devil arms at one time, you never feel overwhelmed by the amount of options you have at your disposal and it gives a hard challenge in which you can overcome with simple actions.
DMC4 stepped it up so you can have everything available at all times, 5 styles, 3 guns, 3 devil arms. Many feels that the game is instantly complex when you start out as Dante and got so much to pick from. However, having this many options immediatly, isn't that what accessibility really is?
Every move is still simple to perform, you don't have to use every single move immediatly, and you don't need to be a mastermind. You can beat DMC4 with 1 style, 1 gun and 1 devil arm on any difficulty still, and without much extra hardship.
DMC3 was hard and had a few options whilst DMC4 wasn't equally hard but had so many options it could feel overwhelming.
But neither of these are less accessible for this. They both have a nice curve in difficulty.
DmC has this curve as well, but many feel that is goes slate far too soon and that it doesn't really develop into this complex state that DMC4 Dante has. Everything isn't explored yet in DmC, so the possibility of something being there might still be there, but for some players who prefer the feeling of DMC's combat mechanics they will still stick to it and continue to prefer it.