I think there needs to be a distinction made between MP and SP. The reason why people have a tough time with the jaguar unit is that you have to realize that Firaxis has made units with Multiplayer in mind as well. The Jaguar is one of the best units in MP, but sucks in SP. Why? Well...let's face it, SP war is very basic. All you do against the computer is stack up a ton of troops, invade, take cities, done. So that's why humans will build large stacks of city taking troops, like axes and swords and go and take cities. Warfare in Civ was designed to be more complex than that, and it is, in multiplayer. In a MP game players will use ALL units at their disposal, including spears, axes, chariots, horse archers, and to a lesser extend swords. In MP it's a lot more difficult than just sending a stack to take a city. There is a lot more fighting done in the field. There is more worker stealing, pillaging, etc. This is where units like the impi and jaguar shine. If you've never played MP against the zulu or aztecs then you can't possibly know what I'm talking about. Basically, if I send jags into your territory and pillage your farms, steal your workers and pillage your metal resources, you're screwed. They are very good MP units and don't need a buff. The problem is just that players playing the AI don't want to bother with all that work, they just want to get in, take the city, and get out. If you want to see the jag at it's best, play MP.