For me, that's a tough one to say. First of all, I don't think any of the theme parks in central Florida are worth what they charge for 1 day, WDW included. That being said, on my next vacation I'm hoping to do them all, as well as Busch Gardens in Tampa. With 11 days, you have plenty of time to do a couple of days at the another themepark change. For Universal, right now, they've been running the Buy 2 get 1 day Free. So 3 days would run you $126 without hopping or $147 with hopping. If you're going after HPDA opens in USF you'll want park hopping so you can ride the Hogwarts Express. Likewise for Seaworld, you can get a Fun Pass for only $10 more than a one day ticket. So, from a money standpoint, for me, if you can figure one than 1 day at the chain it's worth it.
From an experience standpoint, that depends on the person. Like the previous poster said, the thrill rides that the other parks are more intense than their closest Disney equivalent. Universal, IOA, Seaworld, and Busch Gardens, all gave coasters that are more intense than RNR.
In general, I like BG or Seaworld better than AK, and USF/IOA better than DHS.