Ayala allows way to many inherited runners to score. Always has (36% rate)and always will.
Ayala had a team friendly contract but had no options. TJ McFarland
also has no options THIS YEAR but will in the next three. This team will need these options going forward if they use up Matusz and Arrieta's options this year. If they are able to keep both Jake and Brian on the 25 this year they will have an option remaining next year as it will not get used.
I also look at this as a trade of Ayala for McFarland AND Jones. At what point does getting younger not count for something? I think the younger players have more upside than does Ayala hence a younger roster going forward plus the addition of options on these players if/when they are on the forty. A decent move IMO.