1) When Mr. Featherington won, they knew he had cheated. So they came to his house to kill him and take his money. At least that is what I think happened.

2) All of the children in the Bridgerton family have names in alphabetical order. Anthony, Benedict, Colin, Daphne, Eloise etc.

3) I also wondered. Apparently, the Bridgerton children’s father died from a bee sting. Anthony is terrified of bees because of this. I read an article that maybe it is a sign that the next season will focus more on him rather than Daphne.
I’m not sure, but I think the bee is an important symbol. I saw it several times in the show. There was also a beee on the windowsill when Daphne gave birth.