I like it!

Warlock is my favorite 3.5 class, I loved the based mechanics of it, and I always hated how people thought it was underpowered. This seems like a very solid improvement.

My favorite concept from ways back was the idea of a half-ogre warlock, with an emphasis on melee-channeled hideous blow. (He predated Eldritch Glaive) Now I've got to consider, which heritage I should aim for. I could see Giant, but I think I might favor Demonic. Depending on what you want to do with them, they all seem like solid ideas, though.