While that girl's "acting" hits me like nails on a chalkboard, I do like this episode as it gives us our first glimpse at the intricacies of Minbari society. Up until his point all we've had to go on are Delenn & Lennier, both of whom are religious caste and now we get to see the buggers who nearly wiped humans off the face of the galaxy. I think the caste system was mentioned but this is the first time we see that they're not a homogenised culture, but instead have some very distinct contrasts.
It's just a shame that we never really got to see much of the worker caste (I think only one had a speaking role in the whole series!) From reading the 'To Dream in the City of Sorrows'
novel one gets the sense that they're so much more down-to-earth and easy going that either of the religious or warrior castes, who are each very uptight in their own ways.