Well, since I never played the originals outside of emulation, I'm absolutely going to get these.
If you played a Platinum emulation it sounds like you already played the better experience.
On the brightside there's a Porygon-Z so, hey! Probably the platinum pokedex. But I wouldn't be surprsied if there were no swarms, pokeradar, etc pokemon.
Swarms and PokeRadar were in the original game so they'll be in the remake. Just don't expect any improvements to them (and hopefully if they're using Platinum dex they remember to include the Platinum swarms since it's probably the only way to get some of those Pokemon).
I think it's probably likely we get Fairy typing and updated abilities, dunno about anything else.
Fairy-type: Hm, let's see, in the Platinum Dex the following Pokemon were made Fairy-type: Marill family, Mr. Mime family, Clefairy family, Ralts family, & Togepi family. Not a lot, though if the use Platinum's distribution they all should be easy enough to get (you're at least guaranteed to get a Togepi Egg, otherwise gotta use PokeRadar).
Abilities: I did a quick look through some Abilities released after Gen IV which could really give a Pokemon some new life... and discovered some problems. First, not that many Gen IV Pokemon got new Abilities. Second, those who did, got them as a Hidden Ability. Hidden Abilities are a Gen V introduced mechanic meaning Gen IV has nothing in it to help get Pokemon with them or unlock the Hidden Ability. So unless that changes we'd sadly not be able to terrorize Sinnoh with Moody Bidoof, Moxie Heracross/Gyarados, Prankster Riolu, and Regenerator Tangrowth.
Moves: Decided to look up some Moves that really change up the game (such as Shell Smash and Coil) though not any Gen IV Pokemon learn it. However Wormadam and Mothim both got Quiver Dance in Gen VI as an evolution move, so I guess that's something.
And who knows if they plan on bringing over any of the new items like Heavy-Duty Boots.
Feels like a big step back from ORAS... and Masuda being involved doesn't really makes me optimistic. I know he made DP, but you know... it's Masuda...
The Masuda who made Gen IV and especially made Gen V doesn't exist anymore. Sometime after Gen V something happened with him, either he for some reason changed his philosophy for the worse... or he's always been like this but the other staff members were always able to keep him in check for recent years he's been allowed off the chain. I have a feeling it might be the latter.
Is there any way that people can be actually satisfied?
Well obviously this isn't the way!
They look like LGPE. Everyone is mad about it at first, but tuned ou to be a huge success.
LGPE was more than just a 1:1 recreation of Gen I/Yellow. First off the art style, while stylized, still had the characters look anime-esque. Also them replacing Red & Blue with new characters and then revealing Red & Blue were still in the game but now NPC showed LGPE was willing to change up the lore which thus opened up possibilities for other changes/additions (notably seeing a young Archer).