What, pray tell, is a "lag spike"?? If you are referring to network latency issues, then I recommend that you post your message in the Customer Support section of this forum, which offers technical support for log-in, transition-screen, and graphics display performance problems -- i.e., with the game client and the networks that transmit data to/from the host on the megaserver. See also:

https://forums.elderscrollsonline.com/en/discussion/294964/guidelines-for-bug-report-forum#latest
https://forums.elderscrollsonline.com/en/discussion/324056/please-read-before-posting-in-the-support-sections#latest