Ping has generally been stable for me, around 30ms usually.
I personally get a lot of what seem to be shader compilation freezes, which can sometimes be a short 0.5 second stutter or sometimes a long 5+ second time where the whole game freezes. After this my client then has to sync back up with the server which can cause some further rubberbanding and network issues. It usually happens right in the middle of fights of course, which can be quite frustrating. Not sure what to do about it though. I've tried using everyone's abilities in sandbox mode but it never seems to catch every shader.
Example:
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