It would be better if they thought about how to make transactions instant.
Transaction can never be instantly, at least, it will take 10 minutes for a transaction if good transaction fees is used for the transaction.
For the POW, you have to stake a coin before making, that is rubbish because POW does not require coin stalking. The only thing you can talk about is to reduce the fee and if you are not comfortable with it, make use of lightning network for transactions which we can proof to be POS because you will have bitcoin before making lightning network transactions, and it is at a lowest feels with fastest transaction that can take less than a minute at times.