My impressions of the demo are coming from someone who hasn't played a mainline Pokemon since FireRed on the GBA back in the day.
Alright. So the first thing I noticed is how poor the games graphics are. I half expected this from the few screens I saw online, but I thought it would look better on the 3DS and in motion. Nope. It does indeed look like a DS game. Compared to something like Pokemon Mystery Dungeon 3DS, it just pales in comparison. It immediately took me out of the game world.
The next thing, I can finally move in any direction I want. Ah, that feels good. Progress. One step back, a little one forward.
Next, everything is still designed like it's on a grid. The unnatural slopes and edges of the shore are just offputting. Isn't it time they design the world to, you know, look a bit more organic? The Pokemon world should be engrossing. Encouraging players to explore its vivid landscapes.
Then I heard that godawful sound when I touched a wall. The Pokemon games still do this? Very jarring.
Moving on. Battles look pretty nice. I think this is the saving grace of this game. The pisspoor graphics and uninspired environments are a huge detriment to my enjoyment but the core battle mechanics are still somewhat satisfying at least.
My overall impression is that Pokemon is evolving at a glacial pace and it's very discouraging to me. I'm still imagining that living breathing world where landscapes are made to look seamless and organic with Pokemon inhabiting them in realtime. It's not asking that much. We have beautiful 3DS games like Kid Icarus, Mario 3D World and Luigi's Mansion. There's no reason that Pokemon must stubbornly cling to such esoteric conventions. There's a lot they could do with the game without losing the great battle mechanics.
The demo helped me make a decision to not purchase the game, which is very disappointing because I've been recently getting back into the first season on Netflix. Oh well.