Wow, this is a rather steep change. However if they keep the prices reasonable and we get awarded with business class miles, I am ok even with the change fees. Since it is not too much in my opinion as it's still quite a value for money product especially in situations where I need to renew my status.
So far SAS seems to be ahead at least on this point from my opinion since I buy a lot of one-way fares. I can have the option to fly a full service airline rather than stick it up with the low cost.
Cheers!