First off thank you!!!! Flashed KatKiss last night and this is amazing and something I had no idea was possible not long ago also if I should be posting questions about the ROM specifically in the Q&A forum I will do that from now on but the main reason for this post is my wifi and wondering if the GPS in this app will help
if your tablet is warm it usually means that you have something eating the cpu,
Also make sure you flashed the supersu zip + gapps from the rom thread after the rom too.
if you just flashed it's normal that it takes some time to scan back all your medias for example and google is going to download / update and such.
Let it settle a few hours, then reboot, and see if it is back to normal.
if not follow the how to report.