The fact that you insulted DmC Dante (my favorite one) sort of turned me off at first, but I continued on.
I agree with most of the points. I think that if Devil May Cry did a mix of it's own story and the games, it could work. Not try to squeeze it all into one thing of course but take usable elements from each game and put it all in because, let's face it, Devil May Cry as a movie probably won't gander for a sequel unless we got some top writers and top actors to be a part of the movie, and I don't see Capcom going that far for just Devil May Cry.
For the action, I actually think wide shots tend to take away from the action, as oppose to being close to the action but far enough to see the moves being done. Because Dante will be swinging a big ass sword, there should be enough room in the shots to really show how long that ****er really is. Not only that, but there shouldn't be a large abundance of slow motion scenes. Only for when they count. Wouldn't want a Zack Snyder fest all over it like with Sucker Punch (good movie, but lots of slow motion scenes) In the choreography, I'd rather the actor for Dante have a less then refined swordsmanship. Dante's self-taught so he should fight like he is. As for gunmanship, it's not too difficult to shoot in more then one direction. Maybe a lil equilibrium type gun kata, but not be as flashy. And hand to hand combat, again, shouldn't be a perfect blend of Bruce Lee and Jet Li, but rather a Jackie Chan like approach with using the environment as a weapon as well. If Vergil IS in the movie, I feel the actor should display better skill then Dante so that the contrast can be clear about where these two come from. Vergil's swordsmanship being a more engaging iaito where it's not just a single cut and sheath, but more movements and stances to use.
The environment should reflect the mood rather then the tone of the series. If it's a heartwarming moment, go with warm colors. If there's tension, go with dark colors. Not everything should be a brooding grey castle of gothic stuff 24/7. That would be boring to the eyes. Speaking of castles, for the setting, it should be in a more historic place where there's a good mix of old Victorian settings and modern era. Possibly Venice Italy, or Melbourne, Victoria, Australia. No need for a New York-like city. Just somewhere where a sense of magic, and dark sorcery would find a small crack in. For the castles, I always got a theme of castles from France in DMC1, so for locations of castles, I would suggest Mont-Saint-Michel - Normandy as a destination.
The demons should reflect the environment as well. Just throwing any kind of thing into the place, would feel out of place. This is Dante going into THOSE demon's territory and their way of life. The demons should reflect where they are posted at. Also, for design, I feel these demons should be absolutely horrifying. We don't get to have ACTUAL scary devils in Devil May Cry, so for the movie's design of demons, I wanted what PT/Silent Hills was going to have; a mix of Junji Ito and Guillermo Del Toro.