So Omen can't teleport through the bars on Icebox or Ascent on sage wall. I have have played Omen for 800+ hours and had hoped that this would be fixed, but it's been several months now. The developers at Riot haven't even acknowledged this...

Escalation is a mode that you don't really have to think while playing. Sometimes I just want to play a fun laid-back game after a long day and don't want to think much. With escalation, all I have to do is blast some music and shoot people...