That is similair to what I thought as well until the problem started happening for me. I was pure stock 4.4.2 unrooted before I joined this quest to investigate the bad removals. The bad removals started occurring after the 4.4.2 upgrade. A factory reset after the upgrade, caused the problem to disappear for a short while. Then it came back. Pure original 4.2.2 did not suffer from bad removals when I first got the GPad, however I can not say that it wasn't happening silently in the background and I was unaware of it. Either some application I am using (that has been upgraded), or the upgrade to 4.4.2 has started the problem, or my card is now going bad, or worst case, there is a bad set of hardware out there and I have one of them...
I will be ordering a new card and probably reverting to stock 4.4.2 to see if that causes things to go away for me if my current tests continue to show problems.
Honestly I believe your wasting your money buying a new card. I've tried 4 different working correctly in other devices cards and they all bad dismount on the G Pad. I have been continuously monitoring mine and it makes no sense how I can go for days with no problems and then have over 100 dismounts in 12 hours.
I'm starting to really question how accurate SD card monitor is. On a few occasions I would check it at say 10:00 AM and have no problems then check it at 11:00 AM and it would show 20-30 dismounts before 10:00 AM.
After trying all the different roms I'm going to load 422 again and confirm that its a 442 issue. Its just so frustrating to see so many people not having the problem and others that cannot find or fix the problem LG has been zero help in my case.