I have yet to play the game since the transfer.
I have 1gbps internet and my speed test is normal, however my game WILL not patch. It either gives me some error and tells me i need stable connection (im using ethernet) or when it does manage to work after a minute it goes down to like .56 kb/s.
ive reset my pc, completeley uninstalled the game, ive reset my internet, ive disconeccted every other device from my network, i have no idea what to do.

Unfortunately, I'm in the same situation. The Launcher says Patching but is slower than molasses in January. Not as fast as you, but I have a fast connection (500MB). I submitted a ticket yesterday with screenshots and dxdiag info. The highest I've gotten was 21% and that was over 24 hours.

Any fix for this? Wanted to get back into this game, Transfered my account and running into the same issue. I'm stuck at 1% trying to patch what I can only assume is the launcher. Got Fiber internet (500DL/UL), cleared DNS, reset network, uninstalled, updated computer, turned off AV, the works. Still nothing. Left it running for over 48 hours and nothing changes. Sent a ticket, but I fear for a month response.

EDIT: After the update today, it just randomly worked. Yay for me, but unfortunately I won't be able to help out fellow adventurers with the same issue. 

Hey guys I figured out a fix for a similar problem i've been having.  Was stuck on 1% and the download would hang when it got to certain .dll files.

Next time you download hangs on a file and drops 10kbps, take note of the name of the file it stuck on. 

Locate the file in your BDO folder, delete it and restart the launcher.

Keep doing this until you get past the initial 1%.  Sometimes I had to delete the same file repeatedly and restart the launcher.  Eventually the download will continue past the trouble files and your patching will continue smoothly.