In order to answer this question, we have to understand what triggers difficulty adjustments. All Bitcoin miners compete to solve the next block. The more hashpower the network enjoys, the faster that can happen. In order to make sure that the generation rate remains at an interval of 10 minutes per block, Satoshi Nakamoto embedded a feature into the protocol that adjusts the difficulty approximately every two weeks. If during this period, the time between blocks falls below that mark, the difficulty adjusts upwards. If the time between blocks rises above that number, the opposite occurs.
These two recent adjustments came as a result of an immense increase in hashpower. Thus, instead of supporting the death spiral scenario, it would appear to indicate the excellent health of the Bitcoin network.