A longer "real" DRATS period ?

I am a dieheart Supremes Fan, no Diana Ross Fan, but IMHO the DRATS time have very good stuff and productions. It´s sad that Motown made that Diana and The Andantes thing, maybe it was the time to prepare her for her solo career. It would have been nice to see for all these good stuff, to have Mary, Cindy and The Andantes available and for Diana Ross solo albums Surrender, Diana Ross and Everything is everything too. All that A&S stuff would be perfect for a new sound of The Supremes. When we compare the four DRATS albums and then the solo albums, IMHO it´s similar.