I just posted on this issue on another thread, but I'll post here too.

I've been having the same issue ever since the 3/14-15 maintenance. For the three weeks before that (since I bought the game), I was never disconnected, not once. My err90k's have been going all day every day since. I can't stay logged on for more than ten minutes at a time, and walking into a sanctuary (any sanctuary) is a death sentence for my connection 100% of the time.

I've been trying everything:

wireless to hardline (no better)
application forwarding
Manual port forwarding
Kicking my entire family off of the internet so I was the only connected device
calling my ISP almost half-a-dozen times (they'd done everything they could by the 3rd time)
ping tests, packet loss tests, driver updates, Firewalls, routetraces
etc...

No problem with any other application. I even rigor-tested my internet connection and didn't cause any disconnects. Ridiculous!

I think the thing that really chaps me is that after trying the suggested troubleshooting myself, their professional trouble shooters have no other suggestions but what they already have listed on their troubleshooting site. They should tell people that. It would save them a lot of time. No use waiting for a rep if they can't do anything but suggest what's already been suggested.

I'm still quite new to the game. I'm still running on my 30 day free trial, in fact. But if this new maintenance they announced for the 20th doesn't help I think I may have to let my sub. expire. No use paying for time I can't use. I may wait as long as the 2.2 patch and pay for one more month, but this is absurd.

Also, do these problems every get fixed for anyone? Scrolling through the boards I see dozens of posts like this with lots of comments about experiencing similar problems, but I never see anyone say, "it's let up a bit", or "after a few days they got their $H!t together". Do these little 90k fiascoes ever pass?