Wow didnt expect the download to take this long for just 1 character, looks like I'll just download Ryback for now.
The way they handle the DLC with these games is, if you download one, you download them all so you'll be compatible online. So only that initial download should take time, subsequent downloads should be nearly instant since its just unlocking them at that point.
They're not. The whole pack is 317mb. You download the whole pack for compatibility when you download just one. When you go to do the rest, you'll get them pretty much instantly.
... Also, the other characters were more than 107kb. They download for that little because all they are is unlock keys to use the data on disk for them. In other words; all you did was buy the ability to use characters already on disk. So of course it's that little. :P