Katie - You might love the camera (A7series, I personally don't). As I always say to people asking me what camera they should buy - Any current production camera will give you great results if you know what you're doing. This is especially true for you, since you're skilled enough to take the shots you take, that we all enjoy.
But my honest feeling is that you should just use your M-system more. Work within the limitations of the camera, I've seen great work from you, the M is all you really need, and we like the work you do with it!
Unless you're talking about doing things more professionally, as I know you mentioned that you do take jobs. In which case, I suppose the A7series might not be a bad choice if you need better ISO performance and AF. The 28/55/90 would make a pretty decent 3 lens kit that could be used for most any jobs that come your way.
Just want to add, if you're confident and fairly quick/accurate with your M-system. Then I doubt the A7series will give you a leg up in that regard. I find I'm perfectly capable of RF focusing, where the A7 is not capable of AF focusing.
Edward - Tragic and ridiculous, but good to hear that you're safe.