Well Kamala's powers have recently become time related (makes you think will she actually get the time stone or the one that time is needed for to use properly) and I bet there must be some discussions made behind the scenes when using characters for events like this.
Ahura-Kang was a weird choice but something like that but I bet it was to have something feel a little F4 since no one knew when they were coming back.
I do wonder since Ahura gained the memories of his Kang self therefore knows what it means to be a Conqueror and the understanding of time travel it will at all play into training Ms. Marvel how to use her powers in a new way, like if she takes matter from the past and future (too be honest that's what I think is going on) maybe picking selective time lines will give her the ability to look at times when she is at her highest and use that to ensure she is always at her strongest ex: she uses the past when she was boosted by Leer in Secret Warriors.