I am not new to custom ROMs, as I used to do them heavily with my T-Mobile G2 (Desire Z) and my older tablet, the Asus Transformer TF101. I am new to the G Pad, though, having had it less than a week. Now, to the questions...
I started with using the stock ROM, and it's actually not bad, but some of the flakiness with the SD card, along with Amazon Appstore unexpectedly flaking out on me, was impetus to get me to try some ROMs.
First I tried the AICP nightly, then I tried Infected's CM nightly. In both cases, there was the brightness issue (which can be fixed once it's booted up, but it is annoying at first). That's not the end of the world.
What really did bug me though was that none of my 5GHz wifi bands were showing up, and especially with AICP, the wireless in general seems flaky. Can anyone speak to this, or perhaps am I doing something wrong?
In the meantime, can someone recommend a stock-based rom that easily installs with TWRP 18.104.22.168? I could not get a previous version to work properly, and LRS G Pad would not install without rebooting in the middle on 22.214.171.124. I had a heck of a time attempting to install 126.96.36.199... so no, that is not an option. I rewiped my tablet dozens of times trying to get it to work.
Thank you for your help!