Hey! Thanks so much for your response and information. It helps me greatly. You are welcome, I couldn't have done it without the help of others on this forum, that howto really does go a long ways.
Yes, the new image can be easily updated with the sysupgrade package on my link and you can do it from the backup/restore section on the LEDE firmware. It's fast and simple =D
I've removed the Tor and Gnunet because a user found that it was a culprit impacting performance so hopefully that improves your performance. The upgrade image works as I've used it and it DOES flash over the update, you can also choose to keep and save settings and it also carries over.
For the break in Wifi, I have YET to experience that issue on ANY of my routers so I can't pin point the issues on it unless someone else can and I'll work on a fix with their info.
The sources list is an easy fix, I'll have to add that to the readme, I keep forgetting to do that.
What you do, is go to the configuration tab in the software area, navigate to the Distribution feeds section, then find the ptpt52 line, erase it completely.
Next, find the one that says mt7620nand and remove "nand" from that line so it only says mt7620. It should be the first line but sometimes can be the second. Click submit and then you will not have that sources issue anymore.
I believe you will have to redo that for an upgrade but that's nothing you can't handle =D