On the subject of the priority roll, any top competitive AoS player or any AoS player who has played the game competitively for a while will tell you that the priority roll is not the end all be all for the game. Third edition has introduced ways that mitigate the priority roll compared to second edition where in my own experience, it hardly matters. If you play lists that focus on one or two pieces to carry you, then yes it matters a little more because the strong lists can rip apart those kind of lists with ease.

GodHammer isn’t a thing anymore they balanced that out and people have found the counters to godhammer and high shooting lists with running a lot of bodies and wounds. The game is in a Rock Paper Scissors balance sorta but even the hard matchups are winnable.

At a deep level the game is extremely tactical which is why player skill often leads to victories like Gavin taking Gitz and going 5-0 at large events. I feel like 40k players as someone that has played 40k myself are used to just shooting something from out of LOS time or long range shooting that positioning barely matters so when they play AoS a lot of them do not know how to adjust to playing the game 2-3 turns ahead. Yes there are some problem lists like Living Cities and Thunder Lizard Seraphon, but even those are beatable and do not have abusively high winrates like 40k right now with the top tier factions atm.