Hi Stephanie!
All 3 of those restaurants are good selections. My family likes to eat at each one.
At Coral Reef at Epcot, the service and meals we've always enjoyed. They're generally prompt, their waiters are thoroughly informed on menu options, and we never felt we were right on top of other guests there. I would recommend asking for a table close to the aquarium for the full experience. They will try to accommodate those requests, but if it's busy, and you don't want to wait, then you may have to sit further away (The aquarium is massive and can be viewed at any table, but being close has an extra cool factor). Their lobster soup, fish special for the day, Mahi Mahi, and New York Strip are really good.
At Liberty Tree at Magic Kingdom, you feel like you're having Thanksgiving. The meal is family-style, and the menu options include turkey breast, pork loin, stuffing, mashed potatoes, and macaroni and cheese. All very good..
Hollywood and Vine for lunch (Hollywood Studios) is a character meal featuring Playhouse Disney Characters. If you have pre-school aged children, great place to go. If it's just adults, or even teenagers, you may want to choose another place for lunch. They do a lot of song and dance with pre-schoolers, so just want to give the head's up. The meal is buffet with food such as baked chicken, pork loin, pasta, vegetables, etc.
But all 3 were good for us!
Have a magical time on your Disney trip!