The first-year player draft, also known as the Rule 4 draft, was not the only draft process altered by the new CBA. The major league portion of the Rule 5 draft will be affected by giving teams one extra year to protect players from it.
Rather than teams being allowed three years (for players signed at age 19 or older) or four years (for players 18 and younger) before leaving them off the 40-man roster subjects them to the Rule 5 draft, those periods have been lengthened to four and five. Ownership considered this a significant boost in their efforts to operate their minor league systems more effectively.
This is from Baseball America. It would mean that Cueto is not Draft 5 eligible.