I'm still seeing the tick box labelled "that are in my Hot List" on the main Adultwork search page. That's accessing the main site on a computer, not the web app on a smartphone.
I've just checked and I have 388 SPs in my Hot List, which some may see as absurdly high. But I don't use it as a list of escorts I'm definitely going to see; more as a preliminary filter.
Every time I find someone that interests me with some evidence of good service (copious and credible AW feedback or positive reviews on UKP), I add her to the list. This can include escorts outside my normal area but in places I might conceivably visit one day.
I then use the list in conjunction with the search page. For example, escorts in my hotlist and available today in London is not a bad place to start when I'm looking for an on-the-day punt. It returned 48 profiles when I tried it just now.
I used to keep separate lists for regular and trans SPs but there was no need because you can filter for that on the search page if you want.