I honestly don’t know if he’s in better health, have read some but the articles didn’t say. From his condition before I doubt it but I guess it’s possible.
Hopefully Egypt’s next leader will have been influenced by him because he controlled radical Islamists.
Nasser, Sadat and Mubarak were all serious about controlling the Muslim Brotherhood and the MB regularly made assassination attempts (one successful) on all three.
Egypt achieved stability in the last of Nasser's Presidency, and a strong lasting peace with Israel in Sadat's.
Mubarak was considered elderly and not in the best of health for some months before he was forced out of the Presidency, and his health immediately deteriorated severely.
What I suspect:
Immediately after being taken into custody, his health care was sabotaged so as to prevent his defending himself effectively in the MB Kangaroo court set up by Obama. This was the tactic used on the Serbian Slobodan Milosevic after he kept winning in spite of fabricated evidence in his trial. He died in custody.
What I don't know:
How badly Mubarak's health has been damaged.