Yes - it has improved somewhat but wait times are long and unpredictable. There are now three instead of two queues: those who have been in a 'red zone' country, people holding passports who in the before-times could use the automated gates (UK/EU/Japan/NZ..) and then everybody else. When the crowd gets above a certain level additional border staff come out and check by hand [PLF & testing] documents of the second group before sending them to the automated gates.

The UK handling of the hotel quarantine group seems inept compared to the approaches I've experienced in NZ/AU/HK/JP. Those in that queue seemed the most likely to have masks down across chins and as well as being in close proximity to other travellers in the immigration hall were taken through other open terminal areas including in lifts and mingling around the general luggage carousels.