If a module (like the LFG tool) was designed in such a way that a small change meant having to roll out the entire module again, it could easily be that large or larger.
EDIT: The size of the change doesn't necessarily correlate with the size of the download. You may be redownloading stuff that wasn't touched because it was packaged with something that was.
It could also be a lot of Audio changes. I have noticed that the NPCs are saying more unique things and some sounds are fixed often in these patches. There were a few threads that talked about Audio issues where the Community Managers posted that they would fix these with the next available patch. So, this might be it.
If this is the case, it would be nice if they would say, "Fixed some Audio Issues"
Enjoy the game, life is what you really want to be worried about.
PakKat "Everything was going well, until I died"
Gary Gravestink "I am glad you died, I needed the help"
Does anyone know how to download the patchdata like depot_91to92.z01 whithout the game client in this website http://live.patcher.elderscrollsonline.com:80 ? If I can download this updata pack alone,then I could use download software to accelerate the speed of download....