Looks great to me. There is so much to eat at Boma, two nights..you could have totally different meals..lol. Or, try Jiko one night. Either way it will be fine. You did a great job with that..some excellent choices.
As far as Portofino..you will love it. Plenty of great places to eat there.
For breakfast..they have a buffet in the main restaurant, can't remember the name. It gets very busy later in the morning. You can eat inside or out. Food is very good. They also have similar breakfast buffets over at RPR (Islands), and at HRH (The Kitchen).
You can reach either one by catching the boat to city walk, then the resort boat. Doesn't take long at all.
For lunch/dinner. The buffet is also open at Portofino, same restaurant as breakfast. There is also a quick type place..used to serve pizza and sandwiches..we haven't been in there for a while though. It was good last we had it about a year ago. I have heard Mama Dellas is good. Portofino also has upscale..Delfino Riviera..very nice, wonderful food.
Islands over at RPR also has a different buffet..well, rotating, I think there are 4 different choices/different nights. Emeril's Tchoup Chop is also at RPR.
For dinners we aren't impressed with the restaurants at HRH.
HRH does have a cool ice cream place though.
On city walk, very easy to get to from your resort..great places to eat. The Latin Quarter..wonderful..but, make a reservation..as the word is out and the waits can be very long. Don't rely on your room key/next available seating for this...remember 20 people in front of you could have room keys also.
We also like Emeril's for lunch or dinner. NBA city is very good.
We like margaritaville, mainly for snacks/drinks. Nice place to wind down, relax, sit on the deck and watch the people go by.
Inside the parks..across from dueling dragons in Islands of adventure..we like to have a quick meal at the restaurant inside the big tree. If we want a sit down, while at IOA..we go to Mythos. We have also done the character meal at Confiscos..that was fun. I think it has changed a little though.
At Universal park, we stay away from mels. Back by the irish pub, there is a great little sandwich place..they use boarshead meats..wonderful. You can also eat in the pub/restaurant. Usually live music..lots of fun.
Hope that helps. You can also check out uescape.com
to check in to Portofino Bay 
for 4 nights.
