Difference in failures

So it sure seems to me like the MMM failures are similar with the first and second batch.So did they not fix it the first time?Is this a different little problem rearing it's head?I personally will not run 1 that has to be modded to make it work,just for warranty purposes.Also I see alot of people blaming it on setups,either batteries or gearing,can someone explain why a smaller battery would make the esc fail?And why did it seem the MM did alright with the Neu's but people are blaming them for a MMM failure? Why didn't they just mod out the MM to use at least 5s?It seems that that would be more reliable.The main point though is did they really fix anything between v1 and v2?