How many pens in the Majors are set with no new prospects and no veteran's? Do you even know what you are looking for in a bull pen? Each year pens are the most changed aspect of a team. Very seldom do you have a group of lights out pitchers staffing a pen year after year. With of course some exceptions like the Braves pen.
So until you see how this pen works out it would be foolish to just trash it before the season. But of course that fits right into your MO so I wouldn't expect you to stop or even give them ST before commencing with the trashing.