There is really one thing I can't understand. Are these the only pieces you want to play? There are a huge number of piano pieces out there, of varying difficulties, surely there must be some that you like?
Concentrate on the music, the technique will fall into place. Currently, for acquring technique and sound, I play one baroque, one classical and one romantic/impressionistic work. This seems to work will for me, and in the process, I believe that my technique is getting better.
Besides, technique is such a broad area -- it's not just about how to do scales, or thirds, etc. It's how these ideas are set in a piece, and how you interpret them to make them shine, and how you sell the music to your audience.
For studying the basic stuff you mentioned, I have two long term projects suggested by my teacher --
1. Doing all of bach invensions -- spending about one month per invension.
2. Learning the notes to one movement of a haydn sonata a week.
I try to do these well. My teacher is fussy about the sound

and won't let the piece go until i reach a certain standard. I find that this is really a good thing for me -- I means that all the piece I play a not too far from performance standard.
In theory if I manage this, in about a year I would have played 15 invensions and approximately 15 complete sonatas. I think that this will give most of the baroque and classical technique necessary to move on to more advanced pieces.
I really love long term projects. I find them a real challenge.
So far, we've also looked at some chopin and debussy, but I don't have a long term project for the romatic era stuff. Maybe I should ask for one.
My next projects will be to do all of WTC, all chopin etudes, all beethoven sonatas and maybe a couple of sorabji.
