Actually, there recently was a poll on ENWorld regarding all post-PHB classes, set to determine which were balanced, enjoyable, etc - and the Warlock won the poll out of 60+ classes.
Incidentally, the Psion and Psychic Warrior made it into the top 5 of that poll, as did the Duskblade, if memory serves well today. I forget what the other top-five class was. Although the Beguiler comes to mind, I keep thinking that it made the top 20 but fell somewhere before reaching the top 10. I'll have to look up that poll again.
My only complaint is that the Warlock is too focused on a fiendish ancestry. There should be options for celestial, fae, and perhaps draconic and even other ancestries as well. Similarly, there should be some invocations that are only available to certain ancestries and some available to all ancestries, and there should be some alternate class levels for each of the ancestries. In effect, I feel that the class should be non-lawful for its AL and then have something akin to the Ranger's combat styles - each 'style' in fact denoting the ancestry through which the Warlock gains its traits and power. Then there should be a list of invocations, some of which have ancestry requirements, thus keeping the feel of each ancestry distinct beyond a few alternate level class features. Otherwise, I think the Warlock is a well conceived class - good in flavor, design, play, and general enjoyability.
_/_/_/_/_/_/_/_/_/_/_/_/_/_/_/_/_/_/_/_/_/_/_/_/_/_/_/_/_/_/_/_/
As for the CM ToC, I admit that having the remaining specialist wizards granted their own sorcerous base classes might have been nice, but the remaining specialists are among the hardest to grant, I think.
We have:
Dread Necromancer for Necromancy
Beguiler for both Enchantment and Illusion
Warmage for Evocation
So we are left with Conjuration (perhaps a Summoner style class? with teleporting or even some minor healing abilities?), Divination and Abjuration (I can easily see those two combined into one class.), and Transformation (arguably the hardest to make a class for).
As for the Wu Jen, have you forgotten that nearly every Wu Jen spell was also useable by another class - Clerics, Druids, Sor/Wiz, etc? So in a sense it was further expansion of the spell lists of the PHB classes - which no one complained about, as I recall, at the time the book was released. Indeed, many stated that they had expected a notable increase in spells (as, prior to the Spell Compendium, this was one of the largest increases in spell lists in some time since PHB 3.5e came out).
Of the 148 spells listed, only 46 were Wu Jen only - a mere 31.08%, and nearly a third of those were re-copies due to having Lesser and Greater variants of the same spell. Also, nearly all of them could only be used by one of the five types of Wu Jen (metal, fire, water, etc) rather than any Wu Jen. Finally, as the spell section of the book numbered 43 pages out of 192 total pages in the book, this amounts to a mere 7% of the book devoted to only Wu Jen spells (43/192=22.4% of the book for spells, 22.4%*31.08%=6.962% total of the book).
So the Wu Jen did not, as you stated, use up a third of the CA book. Instead it seems to have used up a third of the spell-section of the book - and so a mere 7% of the total book.