The 2016 block retarget is an important property of the coin, in that it determines exactly how the coin reacts dynamically. The dynamics of Catcoin are far too slow for the current crypo environment. It stabilized much to slowly and badly overshot the target difficulty established by market value.

Retargets are heavily influenced by the amount of flexible hashpower that can be turned on the coin. The slow response works (and worked) for BTC because doubling the net hash in less than one retarget time was never feasible. For CAT one multipool can make a 10x increase, this has to be accounted for on the coin can't survive.