Mitchell you hit nail on head. I find because of these issues I put off doing new listings until I can't put off anymore. I have done hardly any brand new listings in months because when I start and there are problems I usually get frustrated and quit for the day.. then day turns to days.
As far as item specifics pop up.. that is something that was in feature center (suggestion area) that is called feature center VERY LONG ago, that while that does not save a lot of time, it would save some if part of the main page rather than a pop-up. Also, would be great to have that so it actually shows up in preview. I know this would only save few seconds.. but with other issues a few seconds is a lot.
Clearing, resetting, router issue and your ISP provider are old song and dance. I have danced that dance and am tired of it.
Am glad you wrote in though, as it lets others know that we are not only ones with issue of slowness.