I think that a lot of the criticism of Civ 5 is unfair.
Yes, in a lot of ways its a simplified version of Civ 4, grossly simplified. But in order to incorporate it's giant leaps forward, it needed to be.
To judge Civ 5 against Civ 4 is ultimately pointless. Civ 5 is a new game, taking the series into unfamiliar territory and as such that exploration is going to have it's twists and turns.
Lets not forget that Civ has always aimed high when it comes to features and AI and while in some respects it's fallen short, it's nothing that's unfixable. But those aspects which require fixing aren't necessarily easy to fix.
1upt logic is hugely different from SOD logic, and I think it would be rather difficult for anyone with a straight face to argue that it's not, conceptually, a better move in terms of strategic play. It needs ironing out but it's hardly unfit for purpose, it's just not very good at present.
Civ 5 is not Civ 4. Too many of the complaints about Civ 5 on these boards utterly fail to recognise that.
Civ 4 wasn't the utopia that it's being made out to be. The AI would stack itself into unconquerability, the SDI was utterlty overpowered making modern warfare extremely difficult and you were forced to create seemingly limitless stacks of collateral damage units to achieve anything.
Science made very little sense as it was consitantly forcing you to balance your economy which could rapidly descend into madness if you had the audacity to expand too quickly and not with the immediate hit that Civ 5's global unhappiness restricts so you could be four or five turns after making an expansion error before your gold deficit decided to catch up. Religions, for all their ills, either crippled you or rendered you utterly OP in the early game before becoming virtually pointless in the industrial era.
The major difference between Civ 4 and Civ 5 is that we now expect Friaxis to immediately do something about it. But that's a shift in the game industry as a whole, where patching and hotfixing are commonplace whereas 5-6 years ago they were pretty much exclusive to MMOs.
Civ 5 is a massive improvement in a lot of ways. Even though it requires work, one can only hope that either an expansion or Civ 6 will bring the elements that work together and make Civ whole again.
But the sky, ladies and gentlemen, is not falling in and the grass was never as green as it's being made out to be.