Jokar,
The Residential Landlord's Association, who wrote the article in FSE have been waging a battle for years to persuade the government to change either the Housing Act 2004 or the FSO 2005. (Or both, who knows). Whilst this may be a laudable aim, (heaven knows its taken enough effort to unpick the contradictions), the government has consistently told them to b*****r off. Rather than accept this and try to assist the very people they purport to represent, they continue with this futile charade.
If local authorities continue to gold plate standards they will be challenged at RPT or in magistrates court. The sign-up by so many stakeholders, including CLG, was deliberate. Whilst the guide is risk based, the courts and RPT will look to it for guidance.
I know you have some concerns about the guide but it was never an ambition to lower standards, just make the reality on the ground easier to manage. e.g. no lobbies up to four floors because everyone knows they don't work. Taken all together I think the guide makes it easier to lift standards in the highest risk premises.