The one thing, well asides for some much needed clarification, that I see the Tome of Secrets Warlock needing is a greater range of options than those provided by Wizard schools.
So I have been toying with the idea of creating "Pacts" that a Warlock can choose.
I'm thinking the pacts should scale in at about the same level as a Wizard school, or Cleric domain.......
Should have multiple ability options to choose from at each respective level.......
I was also thinking that it would be cool to import the Binding DC, Sign, and Influence, idea from WOTC Vestiges.
Between Schools, Domains, and Bloodlines, there is a goodly number of ideas, and examples running around.....so I thought I would see what ideas and suggestions others cared to toss out.
Some ideas I have so far are....
Shadow pact.
Star Pact.
Demon Pact.
Dragon Pact.
Celestial Pact.
Wild Pact (Nature/Fey)
Chaos Pact.
I'll be camping for the next three days, so feel free to toss out any ideas, and I'll jump back on as soon as I get back ;)