[August]

EQ was created from a DnD campaign.

In DND, there is a 5% chance for anything to happen - success when failure is guaranteed, and failure when success is guaranteed.

You can see this most easily with tradeskills - a 250 JC can fail a lvl 17 combine - and will, 5% of the time. Additionally, a lvl 17 JC can succeed on a 250 combine - 5% of the time.

Wouldn't surprise me if the new checks are factoring this in. If you have a 2 minute root there's 20 checks for failure - if each are at least given a 5% chance to break, there's a ~65% chance it will break early. If there are other mitigating factors, it's almost guaranteed to break early (even at just 8% per tick it goes up to 81% to break early)