Verizon FiOs and Level3's car2 hops have frequently shown signs of over utilization for months now with this game. Their exchanges with Level3 in general have been a mess for a long time and have shown up in forums for other games and services over the years.
While technically they are correct in they have no control over Level3's internal network issues--Verizon does have a say in how much (as well as how little) bandwidth is in place at their exchange points into Level3. They also are not exactly restricted to using only Level3's peering either. Both Verizon and Ormuco peer with the same 5 top tier ISP's---including Verizon's own ALTER.NET/UUNET group (Verizon Business).
They have been getting flamed for their shoddy peering on their own forums as well as other places. Keep leaning in them. Keep sending them sample trace data. It may take some time...but if enough people make enough noise they should start to take things more seriously and escalate the issue.