The whole point of having a loyatly program for any airline is to incentivize people to keep choosing and using your company over others by offering perks to frequent flyers. If those perks become hard to benefit from or non-existant (doubling the taxes charged, tripling the change fees, doubling prices for buying/freezing miles, massive devaluation of miles - twice in about 6 years and with only 1 week notice!), then why would anyone go out of their way to pick that airline rather than another one offering a more convenient or better priced flight?

These new developments send the message that we frequent flyers are a bother to them that needs to be curtailed, rather than welcome return customers.
Loyalty goes both ways. Heaven forbid they issue an award ticket every now and then for a person that buys their product multiple times a year.
As a European, I have no freeflowing CC miles and I gather my miles through flying TK or *A. So, I suppose TK no longer wants my custom.