Eh... dunno about that.
I think the 6D is simply a more focused full frame with that focus being the sensor, and less on the bells & whistles, and a lot of folk appreciate that. It just doesn't have the 1D series features like the 5D3 does. I wouldn't call it entry level. It's far form entry level. There is frankly no entry level in full frame. There never was anything but full frame. APS-C is a new concept to the 35mm format world. The 6D for a while was easily the best full frame sensor Canon had outside of the 1Ds/x series. And that's frankly what full frame is about. You can get 1D series features like AF, crosspoints, and all that stuff that has zero to do with the full frame sensor, on any APS-C, APS-H or full frame sensor from Canon now. So it really is just about the sensor when it comes to full frame, and not the features even, anymore. Canon's best full frame sensor that is available is currently in the 1DX, and it's improved performance in quality & ISO performance comes from it's larger pixels and lower resolution, as the 6D has slightly smaller pixels and slightly higher resolution, but is only within a few hairs of that sensor's overall quality. And the 6D sensor is better than the 5D's sensor by a few hairs, at that.
Just another perspective .
I feel like u just said what I did but in greater detail. lol