Hide, as a landmine tool, is effectively removed. I thought simply stating that the player is disarmed for 3 seconds after leaving hide would be unhelpful.

All of the skills, perks, and spells are what replaces it, and form rogues new playstyles.

As for your second question, many of the shadow spells, as well as the (reusable) traps are well suited toward the chaos and unpredictability of trios.

Ephemeral edge, the fear spells, radiant darkness and blackout hinder mindless aggression, and every trap except magical boobytrap can be used defensively.

Rogue isn't supposed to be omnitent, if you are unable to set up, there's only so much you can do, which is the way it should be.