Old-school Slashdot user from the 90s here.
I think what everyone is trying to say is that Slashdot should be left alone. No big makeovers, no big changes. We like it the way it is, and want it to be immune from the pile of suck that has taken over the rest of the web.
Slashdot has remained one of the few sites that has changed little over the years. It is already perfect the way it is, and any change is just going to make it worse. Leave it the hell alone. There is nothing wrong with its usability, readability, etc. the way it is.
Not only that, but... if you are trying to attract a different type of user to the site, you need to keep in mind that the people who are here LIKE the current company. If you attract scores of new users, it will be like an awesome small club opening its membership to all the drunk hobos in the city. The atmosphere and feel of the site are just not going to be the same, and us core, loyal, long time users will LEAVE.
Do what you must, I hope my advice is at least read.