There's nothing wrong with this... Why would AMD throw silicon away when they can bin it differently and sell it? That's how the FM1 and FM2 Athlon's were conceived: salvage APU's that had defective GPU's and simply laser-cut/shut off the GPU and re-badge it as a CPU-only part for a low price. Those Athlon's were popular with budget builders and overclockers.
As for Richland, no it's not the same thing as Trinity. Richland uses "Enhanced Piledriver" cores which allow for higher-clocks at the same power consumption as the previous gen. This is why Richland quad-cores can hit 5 GHz on air with no problems. Richland also brought native support for 2133 MHz DDR3 dual-channel RAM and slightly better GPU performance.
This doesn't have anything to do with Kaveri or Carrizo, it's just AMD deciding to not waste silicon, which isn't a bad thing at all.