I have a few ideas for followers, aspects and other things. I think there could be more support followers who would buff other followers. I was thinking for example about something like making adjecting followers get 1.5 times stats, or giving adjecting followers permanently 1 damage at the end of the round, or making all followers get 1 less damage (good counter for firework master), or retriggering combat trait to the follower on the right/left. Another interesting follower could be a guy who copies everything of the follower on the right/left (combat and additional traits too). These followers would allow for creating cool combinations.
I think it would be useful to have some counters for bosses or opponents with traits. One of them could be reducing the damage taken by all followers, which with a few of them could completely eliminate the threat from firework master. a folkower that attacks the opponent with the lowest health instead of the first one could also be useful. A more expensive follower that disables all traits at the beginning of the opponents' fight and for one round of the opponents it hits could also be good. This would allow for a greater variety of strategies because some of them always lose to specific bosses.
I would also change the follower that steals 2 damage from the recruited damage. to the fact that it would steal all stats from the recruited one and destroy him in the process. The only option to stop it would be to swap it for another follower. Another useful follower would be one that deals damage to all opponents (AOE). For balance, it could get 2 times less stats, or something like that. It would be a good alternative to crow and would not lag so much with high damage.
as for additional traits, some of the above followers could be turned into additional traits. in addition, I have an idea to make it possible to have more than 8 followers through the negative trait - a follower with this trait would not take up space. and when you have a lot of followers, I noticed that you only see those who are currently attacking and you cannot move the view. could this be changed? another trait could be the regeneration trait - after each hit you get 2 or 3 health.
and finally a few more suggestions. I think that the faith limit could be slightly increased, e.g. to 22 or 24, this would strengthen builds with high faith production a bit and maybe there could be a few more expensive followers, e.g. for 22. the last thing I think that the ability to reroll multiple times by buying an upgrade to reroll multiple times would be useful.