Yes I know you're all fed up with these
I thought a valuable addition to the normal 2 player rules
would be this
Allow the active player, in addition to the choices written in the rules,
to be able to swap a tile he has just purchased (following all placement rules) with one in his alhambra, or store, and place the swapped tile in the dummy players board.
This would add further tactical options.
You can wake up now