SE doesn't use Level3... it is your ISP's policies that are making the election to use Level3 to get to Ormuco (SE's ISP) instead of one of the other 3 that Ormuco peers with. In the US, pretty much all the main ISP's have agreements with 3 of the 4 that Ormuco peers with on the residential front (Level3, Cogent, Tata)--some also have agreements with the fourth one, TiNet/GTT. From other countries, the list of names that get involved can get a bit longer, but in many cases you may still wind up on network segments for one of those 4 along the way to the servers in Canada.
If you do your homework and can identify issues around/along the exchange points with the routing partner(s) getting you to Ormuco, you need to get in touch with your ISP's Tier3 support technicians. They are the ones with the resources to conduct the proper type of investigation and than take action to correct the problem--be that getting someone to work with that routing partner to address any issues they find or to change you to an alternate routing partner. At the very least, you can provide them the registered DNS names for the lobby servers (which I will provide in a second) so they can run tests along your assigned route(s) to see what may be going on.
This can and has been proven to work for many. It may take a fair amount of persistence and patience...but it can be done by working with the proper people (ie: your ISP). Your ISP's policies ultimately determine the route you take to SE's ISP (be that Ormuco in Canada, or JP-NIC (or whatever name the government is using now) in Tokyo). By extension, that makes them responsible for resolving issues on your behalf if there are problems along that assigned route, and not SE.
Lobby Servers in Canada (currently for NA/EU):
neolobby02.ffxiv.com
neolobby04.ffxiv.com
neolobby06.ffxiv.com
Lobby Servers in Japan:
neolobby01.ffxiv.com
neolobby03.ffxiv.com
neolobby05.ffxiv.com
Edit:
To further clarify how your ISP may be able to take more direct and immediate action, here is a breakdown of peers available to telekom.at that shows they have other options available for routing you to Ormuco:

Here's a breakdown of who those ASN's are:
Code:
AS1299 TeliaSonera International Carrier
AS3356 Level 3 Communications, Inc.
AS6939 Hurricane Electric, Inc.
AS3320 Deutsche Telekom AG
AS3491 PCCW Global
AS6461 Abovenet Communications, Inc
AS6762 TELECOM ITALIA SPARKLE S.p.A.
AS9002 RETN Limited
AS3257 Tinet SpA
AS20485 Closed Joint Stock Company TransTeleCom
Source: http://bgp.he.net/AS8447#_asinfo
Notice the name at the end... AS3257 Tinet SpA. Ormuco (SE's ISP in Canada) has a peering agreement with them. While other peers may cause additional round-about routing to happen, Tinet is also a more direct peering path to Ormuco like Level3:

Code:
AS701 Verizon Business/UUnet
AS3356 Level 3 Communications, Inc.
AS6453 TATA COMMUNICATIONS (AMERICA) INC
AS3257 Tinet SpA
AS174 Cogent Communications
Source: http://bgp.he.net/AS20324
Hmm.. interesting to note... Ormuco is now showing some peering with Verizon (last looked at their ASN's a month or two ago). Granted, it's more their business class provisioning... but it may eventually prove beneficial to all those Verizon customers in the northeast that have been having all kinds of issues lately.