The things is, many people had their colors just set wrong in the P3D settings. The "HDR" section offers luminosity, contrast and saturation settings, but many people set them wrong, and some people just don't set them at all.
But once you set them correctly, or use a proper shader mod, the results can get quite good:
Concerning the freeware sceneries made specifically for P3D were few, indeed.
But that didn't really matter, as we could just use the freeware sceneries from FSX, which benefited from the new graphic features. Once you get used to the light and shadows in P3D, it's hard to come back to FSX.
Concerning the flight model, well yes planes on rails are indeed a bad thing. For liners it doesn't really matter much, but for lighter or military aircraft, it's a different story. It's even more sensible on helicopters.
I get the point about XP11 being tiring because of unpredictability, but somehow the same can be said about P3D for the exact opposite reason, don't you think?
At least in P3Dv5, we are finally getting somewhat correct contact points for the aircrafts.... finally, after all these years, it was about time...
EDIT: ah, one last word concerning P3Dv5 => it still looks like FSX. You just get exactly the same identical default scenery, excepted for two or three highly detailed airports or cities. The only things that look different are the water and the clouds. But just like in P3Dv4, your freeware FSX sceneries will just benefit from the new features, including better lighting, shadows, and colors