I think bottomlee already got it with his 2nd point. The HRs aren't really a big problem for most of the best arms, but the ~1 IP/game is a big issue. By the time they've thrown 15 pitches, a lot of these guys have energy in the low 80s or even high 70s. By the time they get to 20 pitches most of them are in the 50s or 60s. Once they strike out a hitter, which many of them do frequenly, and put one guy on base, they may have a hard time finishing an inning. Watching Gagne, Eck, and Mo pitch in a few LIVE games will clear everything up real quickly. It shouldn't be surprising. Most starters can't really maintain their RL IP/game in the sim without a substantial performance hit. The level of the competition just drives pitches/inning above the calculated allowance most of the time at $80 million and higher caps. If starters can't do it, why should you expect relievers to be able to do it? And if they can't maintain their RL 1 IP/game, they do decline a bit in utility.