That's the whole point of the item. By the point Reactive genuinely falls off and slot real estate becomes premium, you can easily afford items like unstoppable, counterspell, or even just basic resists.
Those items all have problems when considering the balance between CC debuffs and other debuffs, especially with the nerf to Dispel Magic. Andrewchicken's video inspired me to think of providing alternative solutions to CCs other than counterspell and unstoppable.
What you call problems, I and many others call tradeoffs and counterplay. Those are necessary for making a good and fun concept. Counterspell can get away with doing so much because it requires some form of skill expression to even use. This concept is just an upgraded reactive barrier with even less counterplay (why unshreddable resists?).
Those trade-offs and counterplays do have problems especially in the face of so much overwhelming CCs in-game. Counterspell is good, but with the amount of CCs in the game, I think there should be more alternatives. By providing more options to face CC, It helps with itemization and build diversity. If there are so many CCs in the game, there should be a higher variety of anti-CC beyond just counterspell, unstoppable and debuff reduction (debuff reduction has its own balancing issues, I'm of the opinion that debuff reduction should be separated from CC reduction to allow more fine-tuned balance of both but that's another conversation for another feedback thread).
