Bearing in mind I dont know a damn thing about 3.5E, it seems the warlock is pretty gimped. They appear to get crap for "Invocations Known" (page 78) and the Invocations themselves seem pretty few (page 66-67).
In addition, the Warlock invocation descriptions dont explain much in the way of damage caused. For example, the Lesser Invocation Eldritch Chain states: Eldritch blast arcs to multiple targets. Well, thats super but it doesnt state how much damage or how many enemies.
Is there a "base" damage that all Eldritch based spells do and then these other Eldritch based spells add to it?