No she gotten fat, and gain some weight if you watch the scene. The guy who does the interviews at ADT said that Summer is left the industry for good because she have found love which is her new boyfriend, and is moving to New York with him. Arch Angel was going to release her showcase movie of her which was going to be her 1st DP scene but they said on ADT they won't release it but they will release the anal scenewith Lexington Steele from it which she tweet. That could be her last ever scene, btw I hear bad thing about Arch Angel, and there contract star. Didn't Remy got some beef with Mimefreak wife or something
I don't know if all of this is correct, but I think you are in the ballpark with a lot of it...I don't think she has done anything to her face, but she did put on a noticeable amount of weight...and there's something else going on there, between her hair not looking very good (pretty sure she has had extensions for years, but in that scene it looks almost like a wig, very distracting) and her eyebrows look thicker and darker...overall just not her best look by a longshot...
I think she is semi-retired, she did move in with her boyfriend, but seems like he works in the mainstream entertainment business, no indication she is leaving California...she has obviously shot some scenes since they have been together, so still hope she will put more filth on film...
The showcase movie for ArchAngel seems to be dead - no way they would sit on it for this long if it was good to go...seems like she may have shot a scene or two for it but never followed through with the DP or other mmf scene they always have in their showcase movies, so yeah I wouldn't be surprised if whatever they have shot just ends up getting put in another movie...
as for Summer being high in the latest Brazzers scene, I have no info on that obviously, but in addition to Summer not looking her best, she was really lethargic in the scene, not showing her usual energy or dirty mouth...just a very weak scene all around...
but it is new Summer material, so here are some clips...
http://www.3movs.com/videos/34642/summer-brielle-flaunts-her-huge-tits-and-big-butt/
http://www.3movs.com/videos/34643/summer-brielle-takes-his-hard-shaft-into-her-well-oiled-ass/
http://www.3movs.com/videos/34644/petite-blonde-bitch-summer-brielle-sucks-ramon-s-fat-pole/
and some lesbian fun
http://hosted.puba.com/fhg/jpg/summerbrielle/sb22h/01.php?nats=pubab4bes.16.85.109.0.8755.0.0.0
and some good pics
https://www.instagram.com/p/BLXGgdkB3PZ/?taken-by=summerbisback