I wonder if there was a way to place his “I was once Qui-Gon’s master as he was once your’s” dialogue in TPM - as this would be relatively redundant in AOTC if he is brought forward.
If you wanted to RADICALLY RADICALLY edit both TPM and AOTC - I’d bring much of a robed christopher lee into TPM, then substitute a masked “dooku” into AOTC - who would reveal himself at the end of AOTC.