I think someone wanted to compensate for all those people with greater concentration skill and teaching spells which leads to lower % of lost conc.
Its like giving thieves 3xstab, but then lowering the damage of the first 2 stabs.
But that leads to people who do not have 3xstab to whine even more. False politics i say.
I have noticed this when i had knock learned at 50% and had to use it on a constant basis. There is simply no way, 50% is equal to 50% in the code - I could lose conc when casting the spell up to 10 times in a row, but never did i see myself cast a successful spell 10 times in a row.
But i guess its the same with the pop rate dice isnt it. Some people will tell you the pop rate is 1d3, but you can cycle the mob twice as long for it to pop.
I think the whole system needs to be adjusted. Add a sample size to the code, where you HAVE TO cast 95 (learned % of the spell) successful spells out of a 100, and then it resets again.
If a dice roll is 1d3 - you HAVE TO pop the item once if you kill the mob 3 times.
I think that it will be much more reasonable than the current system.
The problem though, is the slothmud coder in the mood to change any of the systems, and can he/she even accomplish it from a coding point of view?