I have discovered a couple of minor issues. If there is a place on the nexus to mention these, I was unable to locate it. Unfortunately, it could have been right under my nose and I still might not have seen it. Anyway, the first is that the link in the summary for the Morrowind subforum here: http://forums.nexusmods.com/ still points to http://www.tesnexus.com instead of the new Morrowind Nexus. Also, and this might not be fixable, although I am logged in, it seems none of the mods I have downloaded in the past are known. I attempted to endorse a mod I have downloaded before and it said I couldn't endorse a mod I haven't downloaded. As I'm unlikely to download these mods again unless they're updated, I won't be able to endorse them. It is fortunate that previous endorsemants are still there. I guess this is a lesson to me not to procrastinate with my endorsemants in the future.
Actually there is no minor issues instead is just that you'll have to wait a few seconds before the site redirects you to http://forums.nexusmods.com/ and in http://forums.nexusmods.com/index.php?/forum/117-feedback-suggestions-and-questions/ can you give feedback, but can you also report other oddities that you might encounter.
Ah... now I see what you mean if you're referring to the links beneath the forum title. What I mean is the old http://www.tesnexus.com link there is under on both Oblivion, Morrowind forums are pointed to the http://oblivion.nexusmods.com/ site.
I don't know exactly how it's now with the site arrangements of Nexus, but IIRC you still can download mods that you have downloaded before and you can view your download history of only one month if you're not a premium member because they can view the history of every downloaded mod. If you want to view your download history then goto a download site and there move your mouse on top the Files and a menu should be pulled down then select download history at the bottom of the Files menu.
EDIT: I was too fast to press the submit bottom and then I forgot the most important changes there is now on Nexus if you remember how it was 1-2 years ago. In 2010/11 Nexus changed the endorsemant feature a little, because AFAIK the reason was to eliminate the possibilities to endorse a mod without downloading it and you couldn't endorse a downloaded mod to soon after instead you'll need to wait a couple of hours before you could endorse a mod.