I think the reason there's more discussion of the Ray Fisher controversy than the Ezra Miller controversy is that there have been updates on Fishers.
With Ezra Miller, there was the video, some discussion, then nothing.
Whereas with Fisher, there was a tweet, then another, there were people coming out to support Fisher, people coming out to support Whedon, a response from Berg, more tweets, Fishers interview at Justice Con, announcement of an investigation.
There have been updates on the Fisher case, lots of activity which the Miller case has lacked. The Fisher controversy has been repeatedly rejuvenated in a way the Miller controversy has not.