I'm not sure if this has been said or not, but I love how fast this game is compared to Generation IV. Every thing happens much quicker, such as surfing, running, and battles.
It's really nice, unlike Diamond/Pearl's slloooooow everything.
Yeah, I guess GameFreak wants the game to flow more smoothly, what with all the random healers everywhere and faster battles; players can finally get into the core of the gameplay and not have to return to and from faraway Pokemon Centers repetitively.
I also noticed that many of the HM-required obstacles are now just shortcuts (or so I noticed in the second floor of DragonSpiral tower w/ the fallen columns). Although.. this is just speculation, as I have yet to go through Victory Road, where all the actual HM obstacles usually are.