Incorrect, the gym leader rematches were fine and it was better than nothing. That's why ORAS is the worst of the generation, completely neglects anything from Emerald including gym rematches. X and Y will always be the superior games of this generation.
I'm sorry, but I disagree completely. It is very true that some semblance of Gym Leader rematches is better than nothing, and XY outdoes ORAS in that regard. But to call XY superior simply due to Gym Leader rematches (rematches which, I will stress again, are
pathetic compared to earlier installments) does not ring true to me at all. All XY has for post-game content is the Looker mission (which doesn't hold a candle to the Delta Episode), the Friend Safari, and the Battle Maison. ORAS has the aforementioned Delta Episode, soaring, multiple Legendaries to catch, new MEga Evolutions, Super Secret Bases, and Contest Spectaculars. ORAS even has the Battle Maison as well, plus the Battle Resort offers more than Kiloude City overall.
Also, you stress that the lack of features from Emerald annoys you, but ORAS wasn't a remake of Emerald, it was a remake of Ruby and Sapphire. Perhaps Game Freak is saving more Emerald features for Delta Emerald/Z, but I'm not going to play theorymon and start guessing what Game Freak is and isn't doing. My point is, this isn't an Emerald remake, it's a Ruby/Sapphire remake.