What does "dumbing-down the graphics" mean?
Going from fairly realistic (though, I freely admit it, by no means perfect) graphics with more muted colors and semi-realistic designs to a style built around high color saturation and cartoon-like and/or excessively unrealistic building and unit styles.
I personally dismiss the concerns because they're dismissable. For anyone who just doesn't like the graphics, it definitely sucks... but what's there to talk about? Too bad.
I wouldn't agree that those concerns are dismissable, at least no more so than the counterarguments that Civ VI's graphics look great. It's a matter of taste; some people like the graphics and some dislike 'em. Agreed that there doesn't seem to be much to talk about, though; we seem to have divided up completely into respective battle-camps.
For anyone who makes the argument that the graphics are indicative of a watered-down version of civ... well, your evidence maybe be CivRev - but I would counter with Civ5; the most realistic looking version of the game was easily one of the most dumbed down versions as well (vanilla, specifically).
Now, people who said as such were coming off of civ4 and were often told that it was "unfair" to compare civ5 vanilla to civ4 BTS - except it isn't and nor should it be. Civ4 vanilla was overall an improvement on Civ3 conquests... Likewise, civ6 has thus far confirmed that player should expect to get most of the features they found in the completed civ5 BnW - with additional features that seem to further increase the depth of this game (unstacking cities and new civic system, to name a few). Civ5 by comparison really didn't stack up (eyyyyy) to it's predecessor on release.
The only concerns I find justified are if the game, being seemingly so similar to civ5 - is going to be just as easy due to the same absolutely atrocious A.I.
Note - that concern has nothing to do with the graphics because again, civ5 was the most realistic Civ game... and probably had the worst A.I./was the easiest one to play.
So, your view is that because Civ V has realistic graphics and Civ VI (like Civ IV) has more stylized graphics, and because Civ V was overly stripped-down at release and Civ IV wasn't (and that Civ VI looks to not be), then ergo stylized graphics automatically mean that Civ VI won't be dumbed down? I'm not saying you're necessarily wrong, especially with Ed Beach in charge, but I would say that you might be making a bad link here - if Civ VI proves to in fact not be dumbed-down, I personally would probably assume first that Firaxis just opted to not repeat the Civ V feature debacle.
Now: I believe the issue is that cheesy cartoon graphics (pretty much like those of Civ Rev and going beyond those of Civ IV) are automatically associated with dumb mobile games. Now, admittedly, none of us actually know what the gameplay's really like, so assuming that the graphics mean Civ VI will be itself dumbed-down is undoubtedly extremely questionable, but at the same time the association between this type of graphics and gameplay like that of Civ Rev or mobile games is there. This means that even though the links you note between Civ V's gameplay and its graphics are probably as valid as those between Civ VI and
its gameplay, Civ VI's graphics result in a particular association that is highly negative for many people.
I think maybe also that this is all what happens when you have not only people who are used to Civ V-style graphics but also people who have seen the brilliant graphics of the two major Paradox releases this year so far AND Firaxis's own XCOM 2 (amongst several other games), and so expected something more than overtones of "Civ VI: Now Available On iOS and Android!"
You missed the point. Civ IV was stylized, Civ 5 was realistic. Civ 6 is Stylizied. Civ 7 could be realistic. Hence; "why keep doing the same thing over and over again". Between civ 4 and then civrev, it makes sense they went realistic with civ5. From civ5, it makes sense they're going back to arguably the more traditional look; which further makes sense when you add in the whole 25 year anniversary bit.
I'd say that doing the style that's been present in 5 of the major installments in the series and two of the spin-offs pretty much translates to "doing the same thing over and over again", but this particular branch of the argument appears pointless.