but I have not heard of any significant handling problems on UAL 328
This happened at FL360, M0.84, a whole different game. I was shocked to hear how violent the deceleration was and the vibration levels to such extent they couldnt even use the ECL. It became not exactly clear from the interview whether at low altitude they were able to maintain altitude and speed, they assumed they were not but I understood they didnt try to not end up too much outside the established "flyable" envelope.
Interesting fact about why the TAC failed based on my understanding of TAC. As far as I recall, the TAC will still require a valid N1 signal to perform its own estimates. They hard severed cables and invalid N1 and therefore TAC was not able to determine the estimated thrust of the engine and faulted.