I would also consider dropping the seasonal affix from 10 to 5 so that more players can experience it, and get attuned to the mechanic. I often see players say that they are intimidated by it at level 10 because of the challenge of bringing a key up to that in the first place, as well as the fear of messing up the route because of inexperience with the new seasonal.
“Why did you kill Wo, when we’re fighting the boss?!” as an example. Although not a blow to the run as it does give you a damage reduction while in the boss fight, it’s essentially a wasted mechanic because of the loss of stealth + speed to skip an important pack.
Gaining that experience at a level +5 and up will help ease the transition on higher keys while the players can focus more on the added normal affixes and the run itself.