There's a spell in development that will target allies for shielding, but it's not out yet. Ice wall is only on self.
Good call on locations optionally having the dialog popup. I'm trying to figure out if there's a good flow for it. One approach I'm taking now is trying to make a lot of locations either exhaust or change states so they either don't show the popup again or show a different one. Will keep exploring this.
Thanks also for the bug reports! Got em in the log and hope to have them fixed by the next patch.