You haven't toyed too much with them, ain't you?
Playing tall and diplomacy at the same time is by no means easy. Know what happens when you ally too many city states? Your neighbours get angry. And you have way too little an army. Usually a diplomatic civ goes thick (because it needs to, otherwise it cannot produce enough diplomatic units and get near those city states), so it has a decent army; this is not the case for Austria.
Also, I don't see that going Statecraft is the best option for Austria. Letting your alliances fall after you've marriaged, and going Artistry, boosts GP generation while holding a strong grab in the world congress. Even Fealty is not that good, for the bonus is in the capital alone, and you don't really need too much food outside of Wien. If you go StateCraft, then you may have absolute diplomatic control, but it leads to wars with your very small army, but hey, you're the hummy, so maybe you can beat it.
I usually find defending a tall empire to be pretty easy. As long as you plant your few cities in defensible locations being outnumbered doesn't matter much- you can typically hold off endless hordes from a defensible location as long as your army is up to date tech-wise. It's usually easy to have the gold to keep a small army up to date and being near the top in techs is often fairly easy when tall too. I dunno- I guess I just don't see it as a drastic game-play change.
Rome's minigame is different enough. You don't want to build wonders in Rome. You build infrastructure and units. So wonders are in secondary/captured cities. It's one of the civs that can make a puppet empire work. Also, the excess of great generals let you abuse citadels. Normally you place citadels in very well selected places. Here you spam them. Is it novel? Not too much, but enough.
I often find that by investing in buildings in my capital I can build virtually all infrastructure, national wonders, and necessary world wonders with relative ease. I typically spread unit production out or relegate it to a non-capital. I like that the production bonuses and infrastructure survival of conquered puppets for Rome allows you to more rapidly conquer cities and have them start being a net gain rather than net loss (especially in terms of happiness) but it doesn't feel terribly different. It just lets Rome conquer harder, which is nice but not very novel imo.
China... yes you are missing something. You get +1 culture +1 food in ALL cities, when getting new cities (or create great works, I haven't played with that added). I'll put you this way: Settle 6 cities in Ancient Era and your capital will have +6f+6c, your second city will have +5f+5c, your third one +4f+4c, sfsf. So with 6 cities you have like +21f+21c in your empire in Ancient!. This will go down when you pass to next era, but while you get there, it's massive. Does this change the way you play it? Definitely. Because if you prefer to expand in Classical, then you rush to Iron Working, build a massive army and expand. It also changes the way you rush/delay next eras.
I guess I just assume it would still be best to just settle early as much as possible, though, but to never settle when you're about to change eras as your bonus would then be chopped in half too quickly? I think my strategy would probably be to just settle like crazy right from the get-go. That's when the best city sites are still available, that's when the +food/culture is going to be the most impactful (the largest proportion of your normal food/culture generation). I would then probably research every single ancient tech before moving to classical so as to keep my bonuses for as long as possible.
Delaying until the start of classical to settle cities seems like it would just be asking for those city sites to get taken by others that aren't waiting around. Though I could see the mini-game of weighing the benefits of reaching into a new era for a tech vs. staying in a given era to milk the food/culture bonuses could be interesting. I did move China up to tier2 on your guys' recommendation- I should probably play another game as them soon to feel the uniqueness for myself.
Sweden, it may not change your play style if you are a warmonger yourself, but for me it was like "fight always or lose". His uniques are nothing without a fight.
Certainly agree, though I guess my issue is that he doesn't really go about war in a unique way. He doesn't have some interesting relationship with CSs and how strong his army is like Greece, or the interesting Zulu mechanic of intimidating CSs, or a relationship between war and Art/Writing/Music like Japan/France. So war is easier for him because he has kick-ass units but war is not necessarily very different as him.[/QUOTE]
Some civs are unique in the way they play, like China or Venice. Some civs are unique because they can do things that others can't, like the damn fast early expansion of Carthage. Some civs are good for learning a mechanic/ play style, so you play as always, but with a focus on that specific mechanic. With India you learn a lot about religious pressure. With Netherlands you learn about deals. Austria makes you pay attention to CS quests. Sweden is so war focused that you need to master warmongering if you want to play with it. Some civs are just generically strong and can be played the way you like (Poland, Ethiopia).
Totally agree here. I think my own preference is for civs that make me play much differently than normal (so I tend to not bother with Poland/Ethiopia) but totally could see others loving those civs for their flexibility.