Dos Santos enjoyed a long and fruitful career as a player before taking over the reigns at Amakhosi and then the People's Team, and the now National First Division coach believes the South African game is improving every year.
"I would say that improvements have been made in terms of the clubs in the middle of the league," he told the PSL's official website.
"It's good to see teams like Free State Stars and Celtic doing well. Certainly Moroka Swallows as well, and under Muhsin Ertugral, Golden Arrows are showing great improvement.
"These teams are showing good improvement in terms of organization and structure. Another side who have showed a remarkable improvement are AmaZulu under Roger Palmgren."
Looking at this season's current title race, Dos Santos has written off Kaizer Chiefs' chances of challenging for the league and has tipped SuperSport United and Mamelodi Sundowns to be the ones left battling it out for the crown come the end of the campaign.
"For me the favourites are SuperSport and Sundowns. SuperSport under Gavin Hunt have come back In style after last season's struggles. Hunt knows exactly which formation to play, which players to field in specific games," he added.
"Sundowns under Johan Neeskens are producing some exciting football through a professional approach. They still have the same free game, but look very well organised and their football is well co-ordinated.
"What sets them apart is their depth - they are able to bring a player off the bench that is as good as the player he is replacing.
"I feel Kaizer Chiefs are not meeting expectations - they are not as big as a threat as they should be. I believe their squad is a bit short in certain areas and that they are missing some players."