Broken UI? Really? The posters here are so peciliar about UI sometimes. It's bewildering. Nothing was wrong with TPB's UI. It did exactly what it was meant to cleanly and in an easy to use way. Nothing was difficult or unintuitive about it. Did it not look starkly minimalist enough? Did it not use enough css3? Did it use a table and that just ruined the whole thing? Not enough fancy javascript transitions?
The only meme is that old UIs are the /bad/ ones. Those points are all very minor. A major problem would be having an inoperable half-assed mobile version that you were redirected to on mobile.