Nevermind about gameplay (or not being Civ IV BtS v.2), from a technical standpoint, it's already enough to make me feel unimpressed with this product.
1) Bugs; full of them, CTDs, crashes, freezes and sudden disabling of functions, not very uncommon in this game. Granted, previous Civs suffered similar problems too, but to think they never improve their game stability at launch after all these years is really unimpressive.
2) Poor optimization; Honestly, the animations in this game are few and far between, yet I do not understand why this game would tax my system more than Crysis would. Massive slowdowns by late-game are so prevalent that one might think it's part of the game.
3) Non-functional MP Platform; Steam, hotly debated in its use and I don't want to further ignite the debate, but one advantage Steam was supposed to give is a standardized game setup for all players of the game, so why can't I use Mongolia in MP, since it was released for free and everyone online was forced to update to obtain it?
Babylon, Spain and Inca DLC was advertised with the "Multiplayer" tag in the Store but it can't be used? This is fraudulent advertising and Steam and/or Firaxis should be held accountable over this.
Speaking of patching...
4) Botched patching process; latest hotfix produces more CTDs than previous versions and it outright deletes the "CivilizationV.exe", a genuine first in the Civ-series, no wonder it got nominated for GotY in another thread...