First, though I don't know if it's an actual rule here, I've been on XDA for like 4 years now and never seen anyone "bump" their posts... bumping your own post seems kinda faux pas around here, and especially in this device's forum, there aren't enough posts happening for something to disappear after a day or two. Please be patient.
Second, the SD card is not disabled, but Android 4.4 won't allow you to change its contents, so you can use files on it just fine, but you can't copy anything to it or delete anything from it. As Nielo360 mentioned, there is a fix for rooted users.
Third, I was having battery issues as well, but I did a full factory reset and it literally fixed everything. I just made a post regarding this over on EVGA's forums... maybe I'll cut-and-paste it into a post over here as well. Just be sure to back up anything on the internal storage if you try this as it'll wipe everything, even photos/files/etc. With the tablet sitting there asleep, it can literally go over a week without needing a charge, and even in use it seems to be much better than before.