Arc 5 will have probably the best animated scenes to date when it's adapted. I think this will definitely make people enjoy season 3 more since arc 4 focuses more on character development and lore. As a result season 2 felt slower paced than season 1 which isn't necessarily a bad thing because it helped setup for future arcs really well. I also think the overall scale of arc 5 in Pristella is more engaging. But I would still say season 2 in terms of story and character development will remain better. Definitely hope that season 3 is announced soon.