Custom templets for adversaries and environments

Hello.
I’m attempting to start running a daggerheart campaign and I would like to make my own environments and adversary’s.
The framework looks to be there: If I select an environment, i can edit tier, dc, name and add features, But there is no way to remove features, same with adversary’s.

Is there a way to just:
1: Have a blank adversary/environment that is fully editable using the feature library that is currently present?

2: Browse the library of said features in a full page view with the ability to add/hide/remove features?

3: Add containers to the Campaign details page so that along with tags, so that we can further organize our content?

4: Have the ability for players to control select adversary’s in addition to building characters for the players and assigning them said characters to aid in toon building with new players?

I think the above would really add to the experience.
Look forward to hearing back.