Most important changes:
– the 100% earning on cheap W fares are over (these do not earn anything on other Star Alliance programs and will only earn 25% with Miles & Smiles now)
The award chart is now the same for Turkish Airlines and Star Alliance. The chart seems reasonable and no fuel surcharges are charged.
– Mileage Upgrades are now possible from all fare classes, this seems in response to Emirates which runs Skywards mostly driven on upgrades not free flights
More or less what we expected – but it hasn't gotten easier to earn Miles & Smiles miles. They are not a transfer partner of any of tehmajor credit card companies. Maybe that's coming up?