I think they clearly wanted to avoid the comparison to LOTR (and the map intro of GOT for similar reasons), but I think it would have been a great choice. These things have become tropes because they work, audiences expect something like that and it helps them settle into a show, to help it feel real. I was in no way turned off by the way the show started (Moiraine's voiceover, Liandrin gentling a man, Egwene's Women's Circle ceremony), but I do think epic background exposition would have been better for those first 5-10 minutes.