I just looked at the footage today for the first time for the most recent update on the Kickstarter page and, while I understand that the game is still in development, I'm definitely getting a bad feeling about this one. The graphics are what are killing me the most as well as Miriam's movement speed. I hope they at least have a dash of some kind. If anything, I'd like it if they brought in Juste's dash from HOD, so we're not backdashing everywhere. I don't know how anyone would complain about that feature from the game.
As for the graphics, it might just be that Guilty Gear Xrd has spoiled me, but it just doesn't look 2D to me. It would be neat to see the Xrd style for these 2.5D games in the future, but, seeing as Xrd came out in 2014, and that this game was announced in 2015 if I remember right, I understand that probably would have been too much to attempt. I can definitely say I like the concept art images more than the actual in-game graphics...kind of like other peoples' reaction to MN9's graphics. Though, I understand all of these things are subject to change. I mean, go to the Cutting Room Floor Wiki to see how different games can look from their beta versions.
If I'm going to be honest, I think they shouldn't have chosen to port the game to the Wii U or the PS Vita, especially the Vita. Both are older systems with older hardware that will hold the main versions back, in my opinion, which I think may have affected the graphics of MN9 on the more powerful platforms. (Did you see how many systems that game was being ported for?) Now, a Switch port? (even if I think that system has a whole myriad of issues from what I've heard) That's reasonable, seeing as how that system actually is selling and is still in demand. Anything other than the PS4, XBone, Switch, or PC, however, I feel is pointless.
As for everything else, we'll just have to wait and see. I know the game is basically some sort of SOTN/Sorrow hybrid. (I don't keep up with gameplay systems like this until I play the game or watch a review) I think the new skeleton replacement is definitely cooler than just a straight up skeleton, but I hope we see some new enemy types and not just remodels. I would like to see Castlevania with some new things we haven't seen before and not just "Sorrow's spiritual successor with a redesign of enemies to prevent a lawsuit from #FucKonami."
For that matter, give Not-Dracula's first form more than just floating around and shooting fireballs. I realize they're probably not even close to that point in development, but that's just my thoughts on previous Dracula or Dracula-esque battles in the series.
One more thing: integrate the other playable characters into the plot in some way. Maybe give them their own scenarios like in Castlevania 64 and/or some unique bosses and endings? Hey, one can only hope.
P.S. The Vita's situation is so bad that, at the retail store I work at, the electronics department doesn't even sell the PS Vita systems themselves in the store from what I remember working there a year ago. Just saying.
tl;dr - I echo what some of the critics have to say about the graphics, but understand that everything's a WIP. I offer some suggestions as to what they could do with this one that haven't been done with other Castlevania games yet.