You can bind some keys in insert mode to move to the next word like vim-rsi plugin does making vim readline binding aware or use built-in arrow keys. This would be dot repeatable.
Or you can RWed<C-o>/11<CR>12
to replace Tue to Wed, goto normal mode for a single command, search for 11 and continue replacing 11 to 12.
For your example though I would just go for cwWed<ESC><C-a>
-- change word Tue to Wed and increase next number by 1. But that is not dot repeatable.