The primary focus is on enhancing the uniqueness of each coinbase transaction to prevent duplication issues that could arise with existing coinbases. It is suggested not to encode the block height directly within the coinbase witness but rather to ensure that every coinbase transaction includes some form of witness. This approach mandates the presence of an OP_RETURN output in all future coinbase transactions, distinguishing them from any pre-existing ones that might be susceptible to duplication.

Additionally, there's an expressed interest in setting the nLockTime parameter of transactions to the block height. Incorporating the block height in this manner would simplify the process of extracting the block height from the coinbase transaction. Though recognized as a valuable improvement for clarity and functionality, it is acknowledged that this modification does not represent a critical change to the current system. This dialogue underscores the ongoing efforts to refine and secure the integrity of blockchain transactions, highlighting both proposed solutions and areas for further consideration in enhancing transaction uniqueness and data retrieval processes.