i wished that you didnt know you get a disease. It is like cold. You wont noe if you got a cold virus until 2 days later.
Then, REMOVE ALL CURE DISEASE POTIONS!. The game should have medicine like flu syrup and you shouldnt cure your disease immediately, but rather over 3-4 days.

My suggestion: Hopes a modder comes and do it but still,
-Remove all cure disease potions, leave cure poison
-More diseases like common flu
-Assuming that you can fall down and injure yourself, bring some cuts and wounds that need treatment.
-Medicines that cure you over a period of days
-disease effects are lame e.g. -25 health, REALLY?! LAME

But i assumed that bethesda rushed the game and didnt really care about it, just like the food system.

this could annoy a lot of people. especially the alchemists.

No matter how hard Beth works, there's always something to gripe about. Just enjoy what they made..

Bethesda just needs to make diseases deadly and bring back the diseases from previous games.

true.
As for alchemists... too bad

The only significant disease the elderscroll series ever had was vampirism and corpus the later of which no longer exists.