Eh, I can live with the 5th Gym's location, I'm just hoping they can make the region more interesting, Groudon is easily my favorite legendary and like I mentioned before 3rd generation has my favorite Pokémon, so it has the potential to be the best game in the series imo, but it has a long way to go. As long as they nerf the overleveled Elite Four, thus eliminating the super-grind at the end of the game, it'll already be a vastly superior game though.
Platinum didn't fix the speed, it was still slow, and Houndoom and Flareon suck just as much as Rapidash honestly. Platinum also suffers from having to grind too much at the end of the game, it doesn't fix the boring region and its bad flow either. The story is also even more over the top than Diamond and Pearl's was, I still don't see why I have to save the world on my way to become the Pokémon champion, if they want me to do anything more than get rid of a nasty team make it the focus of the game, just like B&W did.