TBH this is episode one, so its pretty normal for people to go 'ahh, not my cup of tea'. Its when there still moaning 12 episodes down the line that I feel like going 'wtf, why are you here?'
Anyhow!
I've not read any of the original material, so judging the show as a stand alone I say it put a lot of effort into establishing the characters. The obvious exceptions being Loki's lot, who we only got a little outsiders window on.
My best guess is that next week we be learning about Aiz in a more detail, since this episode established Bell and Hestia personalities pretty well and Aiz seems important to the plot.