I pre-ordered this game when it came out and was really excited after playing civ 4 like a freak for 5 years. then i got into the game and after playing (when it was new) was utterly disgusted.
people who werent big civ 1-4 players seem to love it and the veteran civ players hate its simplicity.
they seemed to just dumb down the whole engine. in civ 5 it seemed like all you had to do was spam cities and they would be profitable no matter what. there was no science or economy penalty for over expansion and the whole concept of keeping city-states free didnt seem to pay off at all.
i would start out with a decent size country and army and be making a profit for about 2 hundred turns. then after not expanding or training new units i would see my profits just randomly start to drop until i was forced to delete military units and then just resign once i had no army left.
i havnt played the game since it came out and was just wondering if there were any patches or any mods that would address the majority of the complaints. i have a gift card and was thinking of trying out the expansion pack and was wondering if i would just end up annoyed again.
Your rant is only true if you play on the lower difficuty levels. As soon as you start playing on normal (Prince) or higher you will quickly end up in a situation where you have (too) high upkeep cost. Early (over)expansion can really kill your game. Furthermore due to restrictions in happyness it can also be hard to keep your empire happy. Especially if your cities keep growing.
Profits do not randomly drop. You can check your income/expenses it the tool tip. Maybe you had not noticed but each road costs 1 gold to maintain. Therefore the road spam from civ1-4 is a bad strategy. Furthermore "A harbour has an upkeep cost of 3 gold/turn for every city that has one (including the capital). ". If you build 10 harbords then yes your profit will drop

As you can see unit/building/road/city spam will not work.
Regarding the base game
+New combat is great. You really have to think strategically. Protect weak catapults and "puzzle" to assemble your units perfectly.
+no more unit balls
+Graphics
+Happiness is now a global resource (so you dont have to spam the temple)
+resources no longer require road connection
+hexes make more sense
+cities have a range of 3 hexes surrounding them (so bigger than previous games).
-There is a lack of infographs
-There is no earthmap in MP
-There is no mod support in MP (could solve the above...)
Gods and Kings:
+changed tech tree
+new wonders
+new units
+new leaders
+religion (in addition to food,production,gold, science and culture this is a similar resource)
Unlike civ4 religion is something that is created by chosing bonusses from a list at certain stages. The first player to chose has the largest choice.
Patches:
+enemy ai improved
+worker automation greatly improved (they no longer suicide)
Mods:
I use 3 mods in single player
-Infographics (adds a lot of graphs)
-city limits (visualizes city range)
-mod for 2x faster air combat