You really think it's that simple? In Total War, one tends to suffer much higher casualties from simulated battles than from commanding them manually, so zoomed-in combat is still encouraged if not mandatory on higher difficulties.
That's a real problem in Total War, but it's an issue with Game Mechanics and how the AI calculates battles rather than the overall concept. It's also a problem that arguably already exists in Civ and just is less noticeable because there is no Zoom-In Combat. In Total War, you can fight a battle and dislike the results or levels of losses, and replay it with better success. (You can also fight a battle and lose repeatedly only to have it fight automatically and win.) But in Civ, you only can fight the battle and see what happens, possibly with the option of reloading and trying again if you have Random Game See options set to allow it. You can't introduce a human element to change you battle tactics. But that doesn't mean you aren't losing more units and more battles than you really should be as a result of that option not being available.
What I'm favoring is some tweaking to how the AI calculates results, the nature of the results (in relation to Civ IV; the Civ V model being rejected entirely); and an option to Zoom In instead of letting the AI calculate it.