Quote Originally Posted by EasymodeX View Post
Marginal diminishing value is the general result where stacking a stat becomes poorer from a value perspective. This is the basic concept of +10% crit when you have 0 base crit is worth +5% DPS. +10% crit when you have 60% base crit is worth +3.7% DPS. The more crit you stack, the less useful stacking crit is. This effect has a slow decay (each +1% decays the value by 1%).
While I see how this could be construed as diminishing returns, in another sense, it isn't really. If all your other stats stayed the same and you only increased Crit, then each % increase would give you the same increase in total DPS.