Why do you feel scammed? The cdj 2000mk1 is over 3 years old, Of course the Nexus will have newer features they didn;t have on the MK1, You can say this about the whole line of any product out there like the iPhone, the CDJ1000, etc...... I owned the cdj2000 from day 1 of release and I dont feel scammed at all, I bought a player that served me great for 3 years with the features I bought them for. If you like the added features of the Nexus like the scrolling wave, active loop, slip mode, auto hot cues, different color platter and cues, more high res screen, auto sync (which I am with you, I hate it and wont touch it), 4 bar indicator at top of screen, quantize button is more accessible, faster search implementation, wireless and usb iPad/droid integration, loop mode menu for better on the fly loops and so on, then sell the MK1 and get the Nexus, or don't, Pioneer came out with a new product, that doesnt mean you have to buy it or feel scammed by it.
When the iPhone iPhone 4 came out I bought it, 1 year later, not 3, they come out with the 4S, faster and has Siri, did I feel scammed? No, it's technology and it moves fast, again, the MK1 was out for 3 years before the Nexus was released, what did you expect pioneer to do?