He fights the good fight.

(And while you can absorb poison/diseases/etc., you won't get Magicka for it)

If you're on a computer, there's a mod for this. It doesn't add new diseases, but it makes the existing ones more troublesome.

http://skyrimnexus.com/downloads/file.php?id=2905

I actually like that. It pays off to be aware of where you're stepping, and if you notice in time, you can lure enemies into the traps and spring it on them. It also helps at preventing you from being able to mindlessly walk through them because you triggered it and were out of range by the time it would hit.

The diseases in the game are a joke, they don't effect you in any meaningful way and there are only 7 of the, wtf.

I know with attributes gone (and with most diseases in Oblivion effecting those in some way) there is less to effect but.... hell no in fact why not just effect the perks in some way.

As an example:
Brittle Hand disease - Negates all Archery perk points and their effects until the disease is cured

There could be diseases that effect all the other perks in some way as well, with different degrees of severity.

In fact when the CK comes out this may be the first mod I attempt to do...... "Better and Deadly diseases"

Edit: For grammer mistakes

More disease would be awesome.
In Oblivion, I hated diseases because if you had infamy you couldn't pray at the chapels to cure you disease. So you had to be lucky to find some cure disease potions, or make some of your own. Diseases were far too annoying in that game.
With Skyrim, those alters to the Divines are everywhere. Curing diseases isn't difficult. This basically fixes the problem with diseases I had with Oblivion. Getting diseases would be annoying, as it should be, but wouldn't make it so you have 10 diseases, are incredibly weakened, and searching for cure disease potions.
As is, there isn't enough diseases for them to even be in the game.