there are many contradicting versions of our stories...some say that Bramha Jis consort is Saraswati-some say she was consort to Vishnu...same with Ganga-some say she was ShivJis consort,some even say she was his daughter since she orignated from his Jaata,some say she married Vishnu-later given away to Shiva,while some say she was unmarried,one version ive read even says she was Parvatis sister!...the makers have gone with the Saraswati-Bramha,Vishnu-Lakshmi track...
about not showing various characters-they have only shown a few because common...how many people can they show after all-they have shown ShivJis Gaanas but Nandi is given more importance because he was the Most important of them all!
same with Laxmi-some say she was daughter to Brigu and Khyati,while some say she was born out of the Samudra Manthan after which she married Vishnu...while some say she has been with Vishnu since the very beginning!
its all about interpretation...about why they havent shown the children as yet-is maybe because they have shown Khyati,Aditi etc to still be young-maybe they will show thier children etc later in the times to come-the show has still more time to go..
Sati was supposed to be fair-"Gauri" while Parvati was supposed to be Kaali...after she manifested herself into Kaali what remained of her was Gauri...its all pretty complicated!
there are many versions of one single story with different sections believing diffrent things
shruti