I dunno how the new age pen will work out. It sounds good in theory and on paper, but in practice, with real people, the human element is still somewhat unknown. Relievers are sometimes a shakey sort reliant on confidence, routine, and even superstition. The idea is that you may well lose some games in the 9th you might have previously won, but win more games overall. If you take out the routine, you may accidentally reduce the effectiveness of your br est bull pen arms. It's also not clear how arbitrators, general managers, and agents will test the new strategy that deemphasizes closers.