On the topic of the good-evil system itself, i don't think you should be forced down a certain path in the game but rather you should be able to be neutral, but over time the benefits of choosing a side becomes irresistable.I just don't like the idea of starting out in the world and saying "I have to be evil because its what I am". I would prefer a "I have to be evil to use X artifact, or train X monster" etc.
I don't think its going to force anybody. The whole evil/good thing is based on the civilization's culture rather than the channeler. (now that I've just said that, it makes so much sense why building a library increases spell research... the lazy wizards are using his minions to look up spells for him, the lazy bum)
So the channeler might be neutral or even nice. The origin of his magic leans one way or the other. (at least this is how I think it is going to be)
Death magic doesn't need to be a bunch of devestating attack spells, it's the perfect place to have the best physical debuffs, which are just like buffing your own troops when it comes to survival.
don't forget all those lovable death buffs like... turning all your troops into undead minions so they won't starve or freeze to death. Causing them to live in constant pain so that when injured in battle they don't lose any productivity, since they've learned to opperate under those conditions.
As I mentioned before... resurection is a grey spot for me. In most games its a very holy spell/ability (MoM and HoMM both come to mind) but undead as a general rule are "evil". So wouldn't resurrected guys, even if they arn't rotting, brain dead, or craving of living flesh, still be undead? i.e. evil? Its going against the natural way of things (where rapid healing is just speeding up the natural way of things >>> good) Often evil has a counterpart that is incomplete or something similar (animate dead, for example) but just because its not doing the whole job, does that make it any less good?
Perhaps both good and evil could have ressurection. Because no matter which way you twist life magic, you're going to cross that line at some point.