Ep 3 spoilers:
With the fact they showed the sewing club experimenting with making Goku suits with a higher life fiber percentage then the 3 stars can easily get more powerful suits. We saw the tech guy defeat a berserk guy in a 5 star uniform even though he's just a 3 star. Also since Senketsu has been absorbing life fibers according to the rules of the universe it's fundamentally more powerful than Junketsu, even if Ryuko isn't as adept at using it, since the 2 star uniforms have 20% life fiber, right? So doing the math it's at 140% life fiber whereas Junketsu would still be at the base 100%. Maybe this is where the Matoi kamui design differs from the Kiryuin design? It can absorb them. We still know next to nothing about the Scissor Blades also, other than they're designed to combat against Goku uniforms.