I guess I'll write out my thoughts after seeing the video / pictures. First thought: the Tik Tok at the end of their announcement is so corporate Disney and insincere, I know this is a weird point to make but it just feels like those travel channel narrations that someone was paid to narrate and has no real attachment, I would like it to feel more sincere and less corporate Disney but that's a lot to ask for from current Disney. Now as for actual discussion, I think the exterior is a downgrade, I always liked the menacing look it had going, not too scary but the dreary exterior with the skulls and dark colored stones was unique and added a sense of intrigue to the ride. I liked it was a dark exterior with a sense of mystery, and walking in and seeing the dungeon made it feel even more intimidating; now it's a bright colored building with Snow White's bedroom in the beginning, it has a completely different feel now. At least they kept the same structure aside from removing the skulls. For the actual ride, I am hoping this video is overplaying the happy cheery tone now and that the dungeon scene which is still there and apparently has new additions along with the forest scene still actually add some scariness to the ride. I think the dancing scene looks great aside from the Snow White figure just being on a turntable and not doing much but I understand not wanting to / having resources / space for a more complicated figure. I think the mine scene looks great, definitely reusing a lot of tech from 7DMT in WDW, which isn't necessarily a bad thing. Definitely an upgrade over the old mine scene which was basically non-existent. I am curious how much was removed to expand the mine scene. I can go either way on the new ending, it is definitely impressive and looks levels above the rest of the scale of the ride, but I wonder again how much was moved around or if what they showed fits in the very short end of the ride.
Overall I am hopeful, it doesn't look to radically different and the effects of what was added definitely look fantastic, but I am overall sad of the loss of the scary aspect that made the ride unique. I will reserve actual judgement til I ride the ride but I remain optimistic. I think overall these changes are good, I wish there was still more scary in the ride, but I will say what we got does look impressive and hopefully does not radically change the feel of the ride, although I worry that is what happened considering they spent all the time and effort to rename the ride and take the scary part out and make the exterior and queue more happy and cheery. I would have preferred just upgrading all the scenes we already had and maybe some minor changes, like a reworking of the end I am okay with, but again I have to wait and see the full ride for my full opinion.
EDIT: I don't think the screens in the ride are a huge deal. Sure it does look sorta strange having a screen of the original animated scenes of the rides among the 3D props and sets, but I am a sucker for classic Disney animation and love seeing it in HD on a big screen like that. Again I have to see it in person to judge it. I don't think it will feel the same as in the Na'vi River Journey in WDW with the animals in the background on the screen as those videos attempt to give the illusion of 3D of something that's actually there but these are flat 3D cartoons not trying to convey that they're real so I believe they will look better in this implementation. Same with GotG:MB where the screens emulate real people but can't provide depth, I think this 2D animation on the screen will really help sell it to look good.