Not aware of any blog post or forum topics on this. I believe Zcash Developer teams are still focusing on NU5 activation and NU6 is not discussed publicly. However, what will be included in NU6 is likely informed by recent ZF/ZCAP poll, ECC ZEC holders poll, and other data points.
Most likely, the biggest change in the horizon after NU5 is ZSA or Zcash Shielded Assets (think ERC 20 on Ethereum). The ZSA proposal is currently being discussed here.
Thanks @cakewallet
Good luck with the proposal.
Edit:
I believe this feature is unnecessary. If it is, for example due to lots of user request as their favorite exchange only support legacy t-address, then this should be included as an advanced feature.