All of these are great choices; but I would certainly make certain changes in every team.
As for Australia; I would still prefer to have Trumper over Simpson or Lawry; his average is not impressive but reputation certainly is. Also, Smith over Border and Lindwall over Davidson; but those are close.
For Windies, if going with an opener who didn't opened later on career, I would go Rohan Kanhai over Worrell; and as keeper Walcott over Dujon. When he kept, he was a very decent keeper and as batsman he certainly is superior. Also, Gibbs for Garner. This ones close, but I think team needs a proper spinner (Sobers was everything) and Gibbs probably was better than most people give him credit for.
In South Africa, make de Villiers keep. He kept on 24 matches and was a quite good keeper. They have many good Allrounders, I would add a bunch; as Rice, Procter and Faulkner will replace Nourse, Lindsay and Tayfield.
In England, Sutcliffe over Barrington; make Hobbs and him open while Hutton bats at 3. Ames for Knott as better batter, Rhodes for Laker as an extra bat and Anderson, Larwood or Bedser for Snow.
In India, Kumble for Zaheer Khan and Mankad for Laxman as the batting depth is sufficient. Dhoni can bat at 6.
In Pakistan, Moin Khan for Sarfaraz, Sarfaraz Nawaz for Shoaib Akhtar, Abdul Qadir for Saqlain Mushtaq.
In New Zealand, Bert Sutcliffe for Devon Conway, John Richard Reid for Cairns, Bond for Cowie and Boult for Wegner.
In Sri Lanka, make Sanga keep, Mahadevan Sathasivam for Mathews and Ashantha De Mel for Chandimal.