CX will do it if it makes money. I doubt that our opinions are really important; they just want to say that they have done due diligence. The problem is that the results of surveys are not always related to what people do (passengers might say it's a bad idea but still do it once it's available, or say that having the option is a good idea but not actually take advantage of it). The devil is in the details and surveys don't capture actual market conditions relevant to an untested program.
CX has been good about releasing awards in the last few days if seats are empty, unlike airlines that would rather fly with empty seats than issue award tickets. However, upgrade bidding may reduce last-minute awards in higher classes while increasing the availability of last-minute Y awards.