I have no issue with the burned-in subs, but I wish the TPM subs looked more like the AOTC ones. The AOTC subs look like I remember them looking in the theater, while the TPM ones look like Blu-Ray player-generated ones.
Otherwise, great work on these! BD-R copies of your TPM and AOTC have now replaced the official discs in my Blu-Ray set. (I still prefer the official BR ROTS overall, and I'll never watch the 1997 or later versions of the OT anyway, so I didn't bother downloading those four.)