Putting ice breaker behind the dungeon was a bad decision.
Historically I've been fine with returning D1 exotics, raids, and other content because they've been free to play/earn and felt more like extra content.
The dungeon deserved its own exotic that matched its theme and ice breaker should have been a seasonal exotic or included as a quest in the 10th anniversary event.
I think it was meant to be. Originally it was reworked for the 10th anniversary, which also included into the light. Into the light filled the delay gap & then icebreaker was saved for the 10th anniversary season, it was in the season pass, but changed last minute. There's seasonal challenges & guardian rank 7 requirements to get kills with icebreaker, last season was red death, the seasonal pass gun. There's also deleted triumphs for the dungeon to get kills with the primary grenade launcher that's in the season pass.
It can only be put down to the fact deluxe final shape didnt hit projections & they're trying to sell the dungeon key
They still haven't fixed the spelling of vanguard in the engram tracker & haven't added eido to to it.