Exactly same as you, I am using maxis home fibre 10MBps,

Before migration: 190-230 ms
After migration: 150-170 ms

Server migration improved for me slightly. I am at Taman Desa area, where are you at khelben?

I am also on maxis 10. Latency when spike is totally unplayable for serious raid content, especially progression. Normal 260ms, might still be able to play, though not optimum, but at times it just shot up to 600 or 700ms, and my screen still has wow, just that the character stop responding in my screen. everyone seems to stop moving, where in actual fact they are moving. I ran pathping and found there are a few path to have 100 % packet loss. Contacted maxis, their technical team unable to resolve, escalated this problem to tier 2. Still waiting for resolution. Advise others with maxis to call up and highlight to them the issue as well so action can be taken. Or u can just suffer without doing anything.