With that scenario, you're expecting your 4 main starters to get about 200IP and 4 relievers to get between anywhere between 100-200IP. Using the Cubs current expected rotation (Z, Lilly, Hill, Marquis, Prior), there's really one unproven starter (durability not production) and one that is coming off injury plagued seasons. That's a much separate and lesser risk from expecting Rusch, Marshall, and Miller to provide 100-200IP as well as the rotation staying injury free. As far as less pitches per start, it's always better to lean on the side of caution. I'd rather see a pitcher get pulled 10 pitches too early rather see him laboring for an additional 10 pitches while fatigued. The less you pitched while fatigued, the less likely you'll throw with altered mechanics, and the less likely you add more stress than usual per pitch. It's up to the PC to be able to use his expertise and know when the pitcher is putting himself at risk by throwing while he's drained. A pitcher can become fatigued after only 75 pitches or 95, it all depends on his body for that start and how well he prepared himself between starts, which is why I have a hard time just pointing to pitch counts and using it as a reason why he got hurt. You can't underestimate the importance of recovery time between starts. You're never going to be able to eliminate injuries, whether they're blunt traums or accumulative, but being extra cautious is better than being careless.