Well, lets see here. In addition to that, I've noticed:
I can't alter my relationship with other posters (fan, friend, foe, freak) any more, so posters I like won't get that auto karma-boost as I'm reading.
I can't find any way to customize the layout of Slashdot at all. So, no more hiding stories/subjects/authors I don't like for whatever reason. Or adding custom slashboxes.
There's an astronaut next to the 'comment' field that I don't know what it does.
Metamoderation appears dead (and it no longer made any sense, anyway)
I used to have the option of adding a sweet +1 to all my posts for having good karma that apparently went away.
There's no option to post anonymously if I'm logged in.
The 'reply' function doesn't fill in my subject with Re: Parent
Links in posts no longer show the real url so this can happen again: http://slashdot.org
Fonts are a disaster
I was going to make this a snazzy bulleted list, but I have no idea what HTML is allowed
And so on, and on, and on.