The reaction difference is only because of the timing IMO. You posted that after the release of Civ V, when most people were already very disappointed with the new game and looked for the reasons what went wrong. On the other hand, right now most people here are full of anticipation and optimism (hope?) about Civ VI. I share most of your concerns though, and convinced Civ IV will remain the best title until they do another paradigm shift, back in the direction of IV's basic design choices. Hopefully it will happen for VII.