Just one small comment on the plan. Not sure if you've done these restaurants before, but some of them don't get the greatest reviews. Particularly I'm thinking of Mama Melrose's, Tony's Town Square, Sci-Fi and Nine Dragons (the last two in particular).....
There are other options that might be worth at least looking at that generally get better reviews and are 1 TS (for instance at MGM Hollywood & Vine, at Magic Kingdom Crystal Palace, at Epcot pretty much all the other restaurants). Sadly MGM and MK don't have great non-buffet options, but these two buffets are at least worth considering.