It's still a 2 bullet kill within decent range if you hit midsection, just not everywhere on the body and practically every range. I've seen plenty of people use it successfully, it's just not an effortless instakill anymore. I'll agree with you that the spawns can be kinda wonky sometimes (MORE than sometimes, depending on the game) but that's gonna be a work-in-progress. Crappy excuse, but if the downs really outweigh the ups, then maybe it's time to try something else till the next patch hits. Midway through January is kinda late to be complaining about the MSBS nerf...
EDIT: Changed potentially confusing phrasing