Hi David,
The removal of the tx field is based on PPC proposal 14 :
https://github.com/peercoin/rfcs/blob/master/text/0014-transaction-timestamp/0014-transaction-timestamp.mdWe couldn't find a security reason not to implement this feature. And therefore it is currently implemented on testnet. Please let us know what you see a technical/security reason not to implement it on mainnet.
About Blackhalo. This client stopped syncing a few years ago, because the daemon was never updated. The focus was always Blackcoin More as full node and Electrum-BLK as lightweight wallet.
we would love to see Blackcoin More integrated into Blackhalo and release an updated version (maybe even a Python3 version?). Feel free to reach out, there are always people in the community willing to help
Michel