This could open up a whole can of worms, so I'll try to stick to the same genre and location for each of your choices. I'm not saying any of the places you've picked are bad at all, just suggesting alternatives.
Sat: Phoenix Palace and Royal China (there are several branches) do more traditional, but cheaper dim sum. Personally, I prefer the atmosphere at these places. Fryer's delight is OK, I wouldn't go out of your way to go there though. If you're staying east, try Poppie's in Spitalfields . If you're west, try Geale's. I believe it was recently reviewed on this thread.
Sunday: Ususally Tayyabs gets lumped together with Needoo Grill and Lahore Kebab House. For my pick, I prefer Lahore, but different people will say otherwise. Alternatively, why not lunch at the Sunday Up-Market in Brick Lane? There's a huge selection of street food vendors. The Rib Man, Orange Buffalo, and the La Mian noodle stall to name a few.
Monday: If it's oysters you're after have a look at the The Wright Brothers (three branches). Alternatively go for lunch at the Borough Market. There's a stall there called Shellseekers that does fresh shellfish and oysters. Though I think they're only open Wed-Sat.
Tuesday: Try Dishoom instead of Moti Mahal perhaps? Or attempt to wrangle an early-bird booking at Gymkhana?
Wed: Only eaten at Great Queen Street once, and very much enjoyed it. However,
Thursday: The Anchor and Hope is owned by the same people that own Great Queen Street, so you may want to do one or the other. Abeno is good. If it's okonomiyaki you're after, it is really the only option. Otherwise, I like TenTenTei as a good, cheap(ish) Japanese all-rounder. They do several dinner set menus for below 20. If you want to hop on the ramen bandwagon, London is awash with pork broth noodle vendors at the minute.
Sorry for throwing a spanner into your carefully researched plans.
This could open up a whole can of worms, so I'll try to stick to the same genre and location for each of your choices. I'm not saying any of the places you've picked are bad at all, just suggesting alternatives.
Sat: Phoenix Palace and Royal China (there are several branches) do more traditio...