ORAS are Ruby and Sapphire remakes. And not a parallel version or another view of the games. So Ruby and Sapphire are a simpler version of the story, and ORAS extends it and gives us more details. It's like the Odyssey. We can read in detail the epic songs, but we can take a book that will summarize the mythological adventures. For example, the fact of the Frontier Battle is not built yeat, doesnt mean that the protagonist did not participate, but that was a while after the main story. The fact Zinnia not being in the old games does not mean she didnt exist. Same thing for the mega stones. ORAS does not contradict RSE, only complements and adds elements.
About distorted universe, I agree some people are doing a theory, something real. Of course, I have nothing against theories, on the contrary. But still, nowheres stated that this universe without technology is Ruby, Sapphire or Emerald. There is no evidence of that. It could be a universe never mentioned in the games, and that doesn't matter explore it. In addition, there is an official timeline announced by Toshinobu Matsumiya. So the previous games are rather part of the XY universe, and consequently ORAS. The franchise would not officially announce something, then contradict it, because they would rightly lose the trust of fans.
On the other hand, I loved the Delta episode, loved the darker line, the interaction between the characters, the connections with XY, and the fact of being a Post Game that adds something. It would be adorable that other games continue with this more mature line and the post games added something to the plot as well.
On the plus side I think there is no need for a remake of Emerald, because ORAS summarized Ruby, Sapphire and Emerald. I'm more open to Z, since it would be a sequel, like Black and White 2, but still dont think its utterly necessary. A remake of Pearl / Diamond is needed most, as well as more interesting would be to focus on the seventh generation with a good story, interesting characters and a link with the sixth generations plot .Things unexplained could be expanded in the next-generation game, as the discrepancies of Syncamore line; when mega Stones were found and how rare it are.
In the most, besides the remake of the fourth generation games that probably going to be done in a few years, it would be interesting what in the 20 years anniversary a remake of FRed / LGreen / Blue / Red / Green are made, and later Gold / Silver / Crystal.
The first games are good, but compared with others, a little bland and somewhat displaced from other generations. Not because of the gameplay and plot, but because of the technology of the time, which turn out being little "mechanical". It would be great to see further exploration of the plot and characters as in ORAS, and see the connection of all the games, making it clear the relationship between the generations, as was done in XY/ORAS. These remakes could then shut the official storyline, thus giving room for a more linear plot and a better continuation in the nexts generations. Like a story told and developed in chapters.
These Remakes would then be possible to deal more about alternate universes in generation 4 where the main focus is this. And issues like Clair being draconic. Jasmine also appears in the fourth game, which, ironically, like Steven, is a trainer of metal Pokemons. She may have something to do with the Mega Stones and a greater reason to be in Sinnoh. The fact that Steven possibly have a village in Sinnoh and appear in Johto is no coincidence right? Could make clear why the apparitions of these and other characters and give them a greater role in the general pokemon plot.