I know I got sick of playing enemies cabals of scion and having Nakrasus retrieve all the time without ranking into my range forever.

I think the two things that got him criticised were:
- effectively absentee leader
- someone who didn't rank to hero despite being easily able to.

Neither bothered me, because I was his enemy, he never killed me, and normally I had my hands full of fort heroes anyway.

I can see, though, how it would annoy both fort (because of the first point) and enemies (because of the second). But then, if he had ranked up, he might have annoyed enemies even more by killing them at hero. :)