One of the biggest pet peeves I have with this game is the power NoPhase. It is extremely poorly designed and the implementation wasn't thought through at all. Even worse, it is completely unnecessary since phase powers were altered in the PvP environment so as to allow phased characters to attack each other.
This work around was put in place to stop characters from chaining the phasing mechanics so as to be completely untouchable 100% of the time. This was conceived to combat the issue in the PvP environment, however it was enabled for the PvE environment too.
Let's look at just one unintended consequence, and the reason I will never play Ice Armor while NoPhase exists. The Tanker power Hibernate has a recharge time of 120 seconds and a duration of up to 30 seconds. It is affected by recharge reduction enhancements as well as set bonuses. With the advent of NoPhase, an Ice Armor Tanker went from being able to activate Hibernate as much as once every 24 seconds (at max recharge reduction) to once every 120 to 150 seconds. This was a strait up nerf to the set that went unacknowledged at the time. Did Ice Armor need to be nerfed? Was Hibernate too strong of an ability? I will debate until the cows come home that it was not called for, however the bigger issue in my view was the sudden lack of indication for if Hibernate could be used. NoPhase lasts for 120 seconds and has NO visual indicator showing when it will wear off. Compound this with the fact that NoPhase begins 30 seconds after the power ACTIVATES and you get up to an additional 30 seconds to try to time if you don't stay in Hibernate for it's full duration. Ever thought about if you can risk the next fight because Unstoppable is almost recharged? Do you watch the seconds count down until you can use Drain Psyche again? What if you had NO CLUE as to when your power would be usable again? That's what Ice Armor's with Hibernate have to deal with.
Does NoPhase still serve a purpose in PvE? Is there content that can't be stealthed or ignored with high defense/resistance but can be skipped with Phase? I don't think so, but I'm not versed in every aspect of the game, especially the newest +4 Task Force content. Hibernate cannot be used to stealth through missions though, as you're immobile and cannot effect enemies so that isn't applicable to this power. How would the elimination of NoPhase for Hibernate break the game? If Ice armor or Hibernate need to be balanced I'm all for it, but the clunky and frustrating mechanic that is NoPhase has no place being that balancing mechanic.