I took a moment this morning to look these up as well as do a trace route.
54.93.218.82 appears to be the server in the EU; doing a trace route to it showed:
A whole lot of unresolved hosts. Those that did resolve are my ISP (Comcast) and then Level 3. Seeing as I can’t resolve the hosts beyond the Level 3 hop in France (212.73.243.158), any report I would try to give for routing issues stops there. I can only ask my provider to look at its connection to Level 3; if the connection problem is further down, then there is nothing I can do.
I have the same issue as others have noted where US East night time access to EU servers grinds to a halt. It is for this reason that I try not to make use of the Ultima portal network anymore.