Having stayed at a number of these hotels I largely agree with it . The reason why aman is rated lower is that it’s relatively expensive compared to the palace hotel next door ( which is nicer without the brand name ) double in fact . So it terms of value is falls one star - also the crowd in the lobby leaves much to be desired , and it’s not really a true aman like amankila or amanjwo
The rest got four stars largely because it’s old - the chinzano used to be an FS.
if the PG allowed platinums into the lounge frankly i would deduct a star . the lounge is small and is not designed for free loaders . I recommend the westin or Sheraton or Marriott for that .