Rescuing Omeluum from the Iron Throne feels kinda pointless to be honest.

Letting him die or live has no real repercussions. He just gives you a bag of items you can find by scavenging. The only real thing he offers is the teleport to the sub ability that allows you to instantly rescue someone, but on average, by the time you reach and free him, you only have 1 or 2 turns left, so you can realistically only use the instant safe ability on 1 person.

You can't even trade with him again after interacting with him like you can in the underdark.

In addition, why is there no option to have him meet The Emperor? Both are rebel Mind Flayers that broke away from the Elder Brain, and Omeluum is the good aligned version, and The Emperor is the Evil aligned version, so why can't we ever tell them about each other?

It feels like such a missed opportunity