Creativity is what we're lacking and a lack of creativity makes the game boring and repetitive. Not to say that Chandy, Excadrill and swift swimmers are bad, their just too overused. By that I mean its way too easy for a beginner to make a team out of these pokemon in a matter of minutes and get to the top of the ladder in a matter of days. Yes I understand you wont be at the the top of the ladder as quick as you would like with Grunbull and Mightyena, but without creativity and diveristy strategy becomes useless and the spirit of the game, lost. No, Exca, Chandy and rain teams are not the only pokemon and sets repetitively used, to be honest my team even has some, but sending them to their own teir could be a step in a good direction, even if its only for two months. Who knows, X and Y could fix it all or cause new problems, we'll have to wait a see what the future holds.
In conclusion to my rambling lecture and in the queen's english; The reason why they came out with X and Y so early is partly due to the fact that pokemon has increasingly become repetitive and static. What better way to get fans excited again by making another region with a whole new set of pokemon to spice things up? Although most of this has almost nothing to do with said pokemon it seems like a pretty appropriate place to bring this up. Besides, Amethyst is the one making the decisions. So I'll trust her judgdement. And that's my opinion on the subject.
P.S. Im not even sure if I was completely lucid typing all of this. 'n_____n