Thank you for the warm welcome!
I said the DH Burrow exactly because I have the 2010 set, and I think Bellatrix could be included in a Malfoy manor, which could come with amazing minifigures, like Harry, Ron, Hermione, Bellatrix, Lucius, Narcissa, Draco, Luna, Griphook, Ollivander, a Wormtail with a better hair piece and maybe Dobby, even tho that one was in the CMF series so I consider it more unlikely (it would be great for Lego to make a Kreacher minifigure tho).
I have a question tho, why do you think Muriel and Elphias are too deep for lego? I mean, we've had the Trolley Witch, Susan Bones, Gabrielle Delacour, characters that are not very important but that are cool having, so why not them?
Also I think there is a way to get HM characters, and so a Charlie minifigure, with like packs like Bricktober, it would be a great way to get more uniforms and other characters, like Professor Rakepick, Penny, Merula... I know it's unlikely but I messaged lego about that.
Talking of this message, about a month ago I also mentioned that it would be great to get Madam Pomfrey, Gilderoy Lockhart, Kingsley Shacklebolt and Nymphadora Tonks. They said nothing of the first two characters (which I hope we will get in future CMFs, and now that we have a Hospital Wing, Madam Pomfrey should be a must), but they said they were interested in the last two. Btw, in this email, they also mentioned more of Hogwarts (maybe a new McGonagall with her dark robes instead of the green ones and a new hair piece? I certainly hope so, she's my favorite), Hogsmeade (Madame Rosmerta please), what they called "Weasley's Hut" and Diagon Alley, etc...