What's so bad about Warlords? Are you just trolling or were you around when PlayTheWorld was released. Even the relatively well reviewed Civ3 Conquests had little new to offer.
Warlords is the most significant Civ expansion pack to date. It adds the biggest gameplay addition(see vassals) and has the usual stuff people expect (new civs, new scenarios/mods, beefed up MP).
And if you're cheap, wait another 6 months and there will be a gold edition with the original and Warlords.
It doesn't change the fact : Warlords brings not enough new things to justify a so big cost.
(Does it means that Civ expansions are not worth and bring too little things, yes, see Blizzard expansions... ? they are really good)