Bumping transportDefaultStreamMinRefresh from 4kb(to 65kb in my case) in practice removes the WINDOW_UPDATE calls. I do think that 4kb is really low especially as the window size is 4mb, so we are updating it on 0.1% change 
.
I guess there are some downsides to it just being bigger 
- will try to figure out some way to communicate this with the go team and see if there is some desire for most of those constants to be bumped.