The script "disable-ethernet" is a fix for using a USB WiFi adapter with the Lapdock. If you are not using a USB WiFi, with a Lapdock, then do not use the script. Some powered hubs seem to have the same problems with WiFi as the Lapdock. The script may fix them too.
If you leave the onboard Ethernet working, with a WiFi adapter attached, you end up with a whole bunch of USB errors. That is what the script fixes.
You can enable and disable the onboard Ethernet adapter with that script. Sometimes you just have to get it from the horses mouth. Lapdock discussion:viewtopic.php?f=63&t=6747
As to the Elephant in the Room:
" Gracy Get my GUN, There's an Elephant in the ROOM "!
There are indeed some USB problems, But I really do not see them! Lapdock works just fine with a USB HDD and a USB WiFi. Of course I am not transfering large files with the setup. I think the largest so far was like 75MB and no problems. It works fine for a device designed to be a programming tools for education. It, and the software, was not designed to be anything else. There is software out there that makes it do other things. But even so, there are a good number of people out there trying to fix the USB problems.
I know that the performance of the Raspberry Pi has greatly improved since it was released. And it sounds like there is more software fixes being worked on.
I think overall, "Thank you" is the thing to say!