Knowledge Sinkhole
First Post
Correct me if I'm wrong, but if you are commanding an undead constantly to be your thrall, it might have to follow your instructions, but it doesn't have to like it, does it?
This is one reason that the plan I outlined originally called not just for the use of the Command Undead feat (which creates an effect identical to the Control Undead spell, which as you say doesn't specify anything about liking your instructions) but also the Command Undead spell; the spell is the undead equivalent of Charm Person, stating "If the subject is intelligent, it perceives your words and actions favorably (treat its attitude as friendly)".
Don't get me wrong- some ironclad wording of instructions is important, as you are, indeed, still dealing with beings of pure evil. In fact, that might be something worth pursuing as part of this process- might there be a way to engender a (semi)permanent shift in the creature's alignment? Something like a helm of opposite alignment, but that can work on the undead?