1.No more stories that link to pay-walled sites or sites that wont load if you run an ad-blocker. This includes stores that link to Forbes and also stories where the primary source of the information is a journal article that costs money to read.
2.Get rid of (or at least make it possible to totally hide) the "slashdot top deals", "video bytes" and "get the slashdot newsletters" boxes.
3.Have a box in the firehose for "mark this as SPAM" where people can mark things that are clearly SPAM rather than a legitimate firehose entry so it can be removed or hidden (and we have less SPAM cluttering up the firehose)
4.Focus more on stories that are actually "news for nerds". The Tesla story a few stories above this one isn't "news for nerds" just because its about Tesla. The story about the democrats in Iowa isn't "news for nerds" either. Nor are stories about labor issues at Uber or the fact that some company (technical or otherwise) is firing a bunch of people.
5.Get rid of all bundled downloads and adware and stuff on Sourceforge. Every file Sourceforge sends out should be the exact file uploaded by the projects owners.
6.https support with all the latest security stuff. If it doesn't get the highest possible mark on https://www.ssllabs.com/ssltes... you are doing it wrong IMO. This includes doing everything possible to prevent man-in-the-middle attacks. (I believe at least one of the Snowden leaks pointed to Slashdot by name)
7.Make the site more lightweight (anything that can be done to reduce the size of page downloads is a good thing)
8.Completely end the use of Flash or any other closed-source plugin anywhere on Slashdot. Yes that includes getting your ad provides and those who advertise on the site not to use Flash (or getting new ones if they wont agree).
9.Do everything possible to prevent the site (including the ads on the site) from serving up any kind of malware. (ending the use of Flash and Flash ads will help with this since Flash is the #1 malware delivery system on the web)
10.Editors who do their job. No more stories missing a link to the actual article or with spelling mistakes everywhere.