@GalaxyMaster - We usually try to be responsive on the forums, but this is not our official support channel. The best way to get answers is still our customer support (support@audeze). The posting frequency on Headfi etc, varies quite a bit.
1. New earpads are the same dimension as older memory foam option.
2. Yes. Our distributors will have them soon.
3. We have internal battery tests. Total battery failure of excessive loss of capacity from our baseline will be determined using our tests.
4. Depending on the severity, number of people affected, ease of fixing the issue etc, we prioritize the fixes and try to roll the fixes into the next release of firmware. The Mobius is used in a very wide vareity of use cases from composers in hollywood, to game designers, audiophiles, etc. So rolling out new fixes is not very quick, since we have to have longer testing schedules.