Some more suggestions:
Empowering barricade. Same size as towering barricades. Perhaps semicircular to avoid confusion. Doesn’t block bullets or provide damage reduction but increases damage of ally bullets/projectiles passing through it
Blink Dodge. Much faster dodge that confers no bonuses but can be used much more often (like shadestep)
Accelerative Rift. Similar OP’s idea. A rift that grants slightly improved reload speed, ads speed, grenade and melee charge (not super) and mobility. (Bonus mobility would last for a few seconds after exiting rift)
I remember the days when bladedancers ruled the crucible... I might have to hop back onto D1 just for the nostalgia, but not all memories of that super are fond ones....