I know this isn't helpful, but I'm super curious where you and your org end up landing with this. I have been using Amplitude to analyze Braze campaign performance pretty much exclusively since I started using Braze a few years ago -- this is now my third org where we are running that same setup. I don't know if it's possible to do this in GA, but I do imagine there may be other tools out there that get you close to what you get witih Amplitude (Heap, Pendo come to mind, but no guarantees you'll get the same ease of use and flexibility with those platforms).
