I gathered the new info/interesting lines:
GAMESPOT fist look, March 10
Civs:
- Greece is in
Misc:
ruins - new game's version of goodie hut
City-states - neutral cities
of varying specializations (such as a militaristic city-state)
you can leave them neutral
form treaties with them,
take missions from them.
Forming a strong relationship:
A) can be very beneficial
(becoming buddies with the militaristic city-state in our demonstration meant that the neutral burg would send us free warriors every few turns)
B) but it can also upset nearby civilizations who would prefer to have that city-state's services for themselves.
Land:
your holdings will expand one hex at a time
and will tend to automatically grow toward specific nearby areas that your current civilization needs
(for instance, if you've been developing your agricultural base, your nation will automatically tend to expand toward that nearby wheat-growing plain).
- there will apparently be game-specific disadvantages to having two cities too close to each other.
- Civ V will offer you a new alternative to send settlers to a desired area and plunk down a huge sum of gold to simply annex that zone and its resources
Diplo:
you'll still be able to negotiate
- trade agreements,
- travel agreements,
- peace treaties,
- Civ V will also let you enter into research treaties:
essentially, a joint investment of a lump sum of cash that will accelerate scientific research for both nations. This can be a highly beneficial arrangement that earns you friendship points with other nations, and it can also be a serious bone of contention if you cut the treaty short midway
Units:
will take longer to produce and will eventually come to have upkeep costs associated with them
- they will also have veterancy along the lines of what was introduced in Civ IV.
That is, units that survive various skirmishes will eventually grow in power and may be able to select various bonuses to increase their usefulness and survivability
- you and your neighbors will have fewer military units in play than you might have had in previous games in the series, and they'll last longer and be more be more valuable
Combat:
The combat demonstration we watched showed a land invasion of America along two fronts, with enemy spearmen guarding General Washington's town on both sides. Our ranks consisted mainly of warriors, spearmen, and a few archers, and though our relatively weaker warriors unfortunately started on the front lines ahead of our spearmen, we were able to use Civ V's new switch move order to have the two units swap positions, and then we pit our spearmen against theirs. Those crafty Americans set themselves up behind a river, which gave their units a natural terrain bonus, but we softened up our foes with a volley of arrows from a stack of archers placed atop a nearby hill. By softening up our foes and weakening their remaining health, we effectively reduced their terrain advantage and were able to mop them up with our own spearmen, which were at full strength. Meanwhile, on the western end of the border, our troops encountered worse luck. Washington had built his empire around a one-hex-wide choke point in the mountains and blocked it off with spearmen backed up by archers. Because only one unit can occupy any one hex at any given time, there was no way to pass through the mountains without going through the enemy spearmen--cases like these will require your own archers (and other ranged units) to soften up the front lines. However, archers themselves will be extremely fragile and can be easily decimated if they're engaged in hand-to-hand combat
Defence of cities:
One--all cities will automatically defend themselves based on their current growth level and any defensive structures you may have built inside.
Two--you'll want to make sure you defend your key cities with army units, possibly building fort structures nearby to enhance your defenses
Religion is out:
Civ IV's religion system (which was met with mixed reactions) won't be making a comeback,
we're assured by Firaxis that the feature wasn't simply cut without any plans for other new features to replace it.