Well, Scizor and Zapdos have improved a bit, so they're bound to be seen more. Heatran's increased usage's from Garchomp's removal , so it's nothing really new. Suicune? I haven't seen one recently, actually.
Yeah, they kind of overdid it with all of the new Tricksters. (Poor Alakazam <=/ ) I usually find myself carrying a choice user to deal with it, but it's not a surefire "counter" to Trick...
I think the changes are actually nice. Scizor got more popular for one thing (although, it probably wont last for too long), and although Outrage Mence is powerful, it's still managable (Unlike Garchomp). As for creativity, it's not that one can't be creative, but while doing so, they have to be aware of the current threats their team will have to face and develop strategies to deal with them.
As far as the changes go, I'm fine with it as is. I like the new Rotom forms (pretty useful imo) the most out of the upgrades Platinum brought. What I dislike mostly is Skymin's ability to literally hax you to death with Seed Flare and Air Slash, but at least there are ways to deal with that (though they are a bit few in number).
Things should settle as time passes, or at least thats what I think...