Thanks for the informative reply, I’ve looked into this further, and you’re right that low-liquidity assets such as AMPL may be vulnerable to this type of price manipulation attack.
For now, it’s probably best to keep Ampl frozen, but in the future as Ampl liquidity increases, it would be great to see the Ampl market unfrozen, as it is one of the more unique markets on Aave, and it’s differing behavior and utilization rates are quite interesting.