Old crit damage bonus was 25%.
In this post Ghostcrawler suggests the new bonus will be something like "10% of the crit damage each tick for 4 ticks of 2 seconds each (+40% and 8 sec total)".
Judgement and RV have 8 and 10 second cooldowns respectively, so no worries about the dot exceeding the CD. But it's likely there will be places in the dps cycle where the DoT from one ability will overwrite the unfinished DoT from the other. On the other hand, 40% is 1.6 times more damage than we were getting from the old RV.
I don't think it will stack (think Deep Wounds and Ignite), but I still think its a good change.