With regard to the Philipp exercises, Fernando Laires had this to say in the book French Pianism by Charles Timbrell (pg. 84-85):
"Philipp never meant for students to practice any of his exercise books from the first page to the
last. He meant for the teacher and student to pick and choose what was needed....This is the most refined use of Philipp's exrcises - to feel that you are an extension of the keyboard, not that you are hitting and missing as you go along! "Independence" doesn't mean the Hanon-type forcing the fingers to work on their own by articulation, separating the fingers one from the other. By the time you get to Philipp's exercises your fingers should already be able to do that. This is not to denigrate Hanon's exercises. Although Philipp called them peu intéressants, he never suggested that they were useless. It depends on how you practice them. With Philipp's exercises the fingers will gain their independence by having complete control, complete relaxation on the part of those fingers that are touching the keys but not pressing them down, versus those that are pressing them down."
I actually found Philipp's Caprice Op. 21 in my School's music library, but that was the only work that I found in an actual published volume: French Piano Music An Anthology by Dover Publications, Inc. All of the other works I have are off the internet.
I have heard that Cortot's method's for studying the Chopin Etudes are very helpful, but I have not looked at anything of his so I would not be able to say for certain.