So, this came up while I was out in Michigan and offline and introducing a friend to the game. He rolled up a Fire Lord (Warlock specializing as a Pyromancer). I wasn't sure which, if any benefits he ought to get from the Pyromancer write-up. This also managed to roll off my brain when one of my players rolled up a death soldier. I think at the time I let him have the +2 on saves from both the Necromancer and Warlock descriptions. Soberer(ish) reflection led me to think that maybe that extra save bonus should have kicked in at third level.
Anyway, I'm not clear on the other class special abilities and whether they come over fully--the Pyromancer's hand candle and fire affinity, the Necromancer's command undead ability.
Ghul, what was your original thinking?
Others, how have you played it?
I'm tempted to give the Class Abilities straight off and let the save bonus kick in later. That is, Warlocks get +2 for Transformation and Sorcery. A Fire Lord would add +2 vs. device at 3rd, and a Death Soldier +2 vs. Death at 3rd.