I don't remember the Android UI framework being bad at the time. Android 2.3 time period? I remember Fragments coming out, and the overhaul on the UI for Android 3 (I had a Motorola Xoom and it was nice to use), then every Google i/o conference saying they'd improved speed ("Project Butter") and UI responsiveness etc. but it was still laggy for scrolling etc.
But the framework itself doesn't seem much different to today. I remember using the HTC Desire and HTC Dream and being impressed, then the Motorola Atrix 4G with lapdock (!), a device ahead of its time and with insufficient RAM or CPU performance but the a great idea running a nice Linux desktop environment.
I suddenly realise how long ago this was and how old I feel.