lilypad
Yes! Sonatinas are great when you reach a certain level because of the numerous patterns they contain. You have to learn to group the patterns and focus mostly on what is changing. For example, if there is an Alberti bass in the LH then you take a quick glance every measure to see what chord it is while you focus on the RH.
Of course, all music contains patterns but sonatinas and sonatas are so full of patterns like arpeggios and scales that they are very useful. They also train your ears to anticipate the modulations from sub-dominant to dominant to tonic, which are also a very characteristic feature.