Well also to be fair, people were mad because for the longest time there was NO WAY to get the older Pokemon in RS, and Emerald only added a handful. Gen III was when Nintendo when crazy cashing in. If you wanted to "catch them all" you needed RS for Gen III, FR/LG for Gen I, and Colosseum and XD for Gen II. Thankfully they've moved away from that.
Not to say the focus on new Pokemon wasn't good. I liked that a lot. That's...also the same reason people like B/W though, so I'm not sure that was ever the issue.
--
You have no time to ponder such questions, as Link has just grabbed a Smash Ball.
http://backloggery.com/herodeltiempo/sig.gif