Consumers are unfairly disadvantaged by the mixed technology mess: e.g. two consumers paying the same amount, one could get 100Mbit, one could get 55.
The poor speeds and reliability of copper and HC affect the ability of small businesses and home businesses to compete with larger ones
Small ISPs are disadvantaged by the mixed technology NBN as they do not have wireless networks to fall back on when the MTM can't fulfil its purpose
Smaller ISPs might be less likely to compete as the NBN will not be fit for purpose in a matter of a few years
NBNCo is now run by the ex-CEO of Telstra and this is a conflict of interest, especially with NBNCo paying Telstra billions of dollars for the copper and HFC